Structure of transport tissues — Paper 1 · A Level Biology 9700

29 A region of a stem of a plant is heated to kill the cells in the living vascular tissues. How will this treatment affect the transport between roots and leaves via xylem and phloem? xylem phloem v v J transport continues x transport stops 0 0O WD > v x x v x x

1 marks

Answer: B

This question in 9700/11 Oct/Nov 2004

30 Some soil-borne fungi cause wilting in crop plants by growing within the xylem vessels. Which process will be directly affected by these fungi? A conduction in the apoplast B development of root pressure C stomatal movement D uptake of water by root hairs

1 marks

Answer: A

This question in 9700/11 Oct/Nov 2004

26 The diagram shows a longitudinal section through transport tissue in a plant stem. X What are the names of the structure labelled X and the tissue in which it is found? structure X tissue A sieve tube phloem B sieve tube xylem C vessel phloem D vessel xylem

1 marks

Answer: D

This question in 9700/11 May/June 2006

24 Which organelles occur in large numbers in companion cells in phloem? A chloroplasts B lysosomes C mitochondria D starch grains

1 marks

Answer: C

This question in 9700/11 Oct/Nov 2006

4 The diagram shows a transverse section of part of a dicotyledonous leaf. 1 4 2 3 What are the correct labels for 1, 2, 3 and 4? 1 2 3 4 A phloem xylem palisade mesophyll spongy mesophyll B phloem xylem spongy mesophyll palisade mesophyll C xylem phloem palisade mesophyll spongy mesophyll D xylem phloem spongy mesophyll palisade mesophyll

1 marks

Answer: D

This question in 9700/11 Oct/Nov 2007

27 Which combination of features is characteristic of phloem sieve tubes? solute potential of lignification of the cell content the cell wall A high absent B high present C low absent D low present

1 marks

Answer: C

This question in 9700/11 May/June 2008

24 Which feature of a root hair cell is not an adaptation for water uptake from the soil solution? A lack of a waxy cuticle B large numbers of mitochondria C long, thin extension to the cell D thin cellulose cell wall

1 marks

Answer: B

This question in 9700/11 Oct/Nov 2008

4 Which plan diagram of a transverse section of a leaf correctly shows the position of xylem and phloem as well as the fact that the palisade mesophyll is twice as thick as the spongy mesophyll? A B xylem phloem phloem xylem C D xylem phloem phloem xylem

1 marks

Answer: C

This question in 9700/12 Oct/Nov 2009

26 Which description states some of the features of xylem vessels? A cells joined to form a tube, pits at intervals, sieve plates between cells, surrounded by the endodermis in roots B contains cells joined end to end, containing peripheral cytoplasm, cell walls with secondary thickening of lignin, located to the outside of phloem in vascular bundles C contains elongated cells with end walls broken down, located in vascular bundles in the stem and centrally in the roots D dead elongated cells, lignified cell walls with pits at intervals, associated with companion cells in the roots only

1 marks

Answer: C

This question in 9700/12 Oct/Nov 2009

29 When stained, which features, visible under the light microscope, are part of the cells of the plant tissues listed in the table? xylem elements sieve tube elements companion cells A cytoplasm lignin nuclei B lignin cytoplasm nuclei C lignin nuclei cytoplasm D nuclei cytoplasm lignin

1 marks

Answer: B

This question in 9700/12 Oct/Nov 2009

25 The diagrams represent the cross section of the stem, root and leaf of a non-woody dicotyledonous plant. In each section the distribution of the tissues is shown. 1 5 3 2 4 6 Which sequence of numbers correctly identifies the distribution of xylem and phloem in the stem, root and leaf? xylem phloem A 1 3 5 2 4 6 B 1 4 6 2 4 5 C 2 3 6 1 3 5 D 2 4 5 1 3 6

1 marks

Answer: D

This question in 9700/11 May/June 2010

6 The diagrams represent the cross section of the stem, root and leaf of a non-woody dicotyledonous plant. In each section the distribution of the tissues is shown. 1 5 3 2 4 6 Which sequence of numbers correctly identifies the distribution of xylem and phloem in the stem, root and leaf? xylem phloem A 1 3 5 2 4 6 B 1 4 6 2 4 5 C 2 3 6 1 3 5 D 2 4 5 1 3 6

1 marks

Answer: D

This question in 9700/12 May/June 2010

7 The diagrams represent the cross section of the stem, root and leaf of a non-woody dicotyledonous plant. In each section the distribution of the tissues is shown. 1 5 3 2 4 6 Which sequence of numbers correctly identifies the distribution of xylem and phloem in the stem, root and leaf? xylem phloem A 1 3 5 2 4 6 B 1 4 6 2 4 5 C 2 3 6 1 3 5 D 2 4 5 1 3 6

1 marks

Answer: D

This question in 9700/13 May/June 2010

24 Which shows the correct structure of mature xylem vessel elements and phloem sieve tube elements? cytoplasm nucleus end wall A phloem J J v xylem v x x key B phloem J x v / = present xylem x v v X = absent Cc phloem Jv Xx v xylem x x x D phloem x v v xylem x x v

1 marks

Answer: C

This question in 9700/11 Oct/Nov 2010

25 The photomicrograph shows a transverse section through a leaf. ×50 1 sunken stomata 2 two layers of epithelium 3 thick cuticle 4 small surface area to volume Which features of a xerophytic leaf are visible in this section? A 1 and 2 B 1 and 3 C 2 and 4 D 1, 2, 3 and 4

1 marks

Answer: B

This question in 9700/11 Oct/Nov 2010

24 What is the main function of a companion cell in mature phloem tissue? A providing cytoplasmic contact with the sieve tube element for loading B providing structural support for the sieve tube element C providing the nucleus for cell division in the phloem D providing the source of assimilates for storage

1 marks

Answer: A

This question in 9700/12 Oct/Nov 2010

26 The diagram shows a transverse section of a stem. Which area is the phloem? A D C B

1 marks

Answer: B

This question in 9700/12 Oct/Nov 2010

2 A student was asked to draw a plan diagram of the plant tissue shown in the photomicrograph and to annotate two observable features. What are the correct annotations? A epidermis darkly stained layer of cells, xylem hollow vessels B epidermis formed of single layer of cells, xylem strengthened by lignin C phloem small cells, xylem empty cells to transport water D vascular bundles arranged in a regular pattern, xylem large dead cells

1 marks

Answer: A

This question in 9700/12 May/June 2012

2 Four students were asked to suggest a set of four labels to add to a plan diagram of a transverse section of a dicotyledonous leaf. Which student, A, B, C or D, suggested a correct set of labels? label 1 label 2 label 3 label 4 A lower phloem spongy palisade epidermis mesophyll mesophyll B phloem sieve upper spongy xylem vessel tubes epidermis mesophyll elements C spongy endodermis xylem vessel palisade mesophyll elements mesophyll D waxy cuticle xylem companion spongy cells mesophyll

1 marks

Answer: A

This question in 9700/11 Oct/Nov 2012

23 Which row correctly identifies xylem vessel elements and sieve tube elements? xylem vessel element sieve tube element cytoplasm | nucleus | cytoplasm | nucleus Jv v x x key J/ = present 0 0N0 WwW > x J x x x x Jv Jv X = absent x x Jv x

1 marks

Answer: D

This question in 9700/11 Oct/Nov 2012

27 The diagrams show transverse sections of parts of a plant. leaf stem root 3 1 4 5 6 2 In the transverse sections, what do 1, 2, 3, 4, 5 and 6 represent? leaf stem root phloem xylem phloem xylem phloem xylem A 1 2 3 4 5 6 B 1 2 4 3 6 5 C 2 1 3 4 5 6 D 2 1 4 3 6 5

1 marks

Answer: C

This question in 9700/12 Oct/Nov 2012

5 When drawing a plan diagram of a transverse section of a dicotyledonous leaf, which feature should not be included? A cuticle on the upper epidermis B palisade mesophyll layer C vascular bundles in the leaf lamina D xylem vessel elements

1 marks

Answer: D

This question in 9700/13 Oct/Nov 2012

22 Which correctly matches the structure and function of sieve tube elements? structure function A cellulose cell wall with no lignin to prevent loss of water B end walls modified to slow down the rate of form sieve plates transport of solutes C elongated cells joined form a tube to transport dissolved end to end mineral ions and water D peripheral cytoplasm to provide as little resistance with no nucleus to flow as possible

1 marks

Answer: D

This question in 9700/13 Oct/Nov 2012

25 Which plant cells do not contain a nucleus? 1 companion cells 2 sieve tube elements 3 xylem vessel elements A 1 and 2 only B 1 and 3 only C 2 and 3 only D 3 only

1 marks

Answer: C

This question in 9700/12 May/June 2013

24 Which feature of xylem vessel elements allows them to have reduced resistance to water movement? A lignin forms an incomplete secondary wall B new vessels carry extra water as a plant grows C there are no cross walls between vessel elements D vessel elements join to form narrow tubes

1 marks

Answer: C

This question in 9700/11 Oct/Nov 2013

24 Which feature of xylem vessel elements helps the cohesion of water? A lignin forms an incomplete secondary wall B new vessels carry extra water as a plant grows C there are no cross walls between the vessel elements D the vessel elements form narrow tubes

1 marks

Answer: D

This question in 9700/12 Oct/Nov 2013

23 Which feature of xylem vessel elements allows them to stay open as transpiration increases? A new vessel elements carry extra water as a plant grows B there are no cross walls between vessel elements C vessel elements form narrow tubes D walls of vessel elements contain lignin

1 marks

Answer: D

This question in 9700/13 Oct/Nov 2013

25 The photomicrograph shows a vascular bundle from the stem of a plant. Y Z X What are the correct labels for structures X, Y and Z? X Y Z A companion cell sieve tube element air space B sieve tube element xylem vessel element air space C xylem vessel element companion cell sieve tube element D xylem vessel element sieve tube element companion cell

1 marks

Answer: B

This question in 9700/11 May/June 2014

23 Which feature of xylem vessel elements helps adhesion during transpiration? A lignin forms an incomplete secondary wall B new vessels carry extra water as the plants grow C there are no cross walls between vessel elements D the vessel elements form a narrow tube

1 marks

Answer: D

This question in 9700/12 May/June 2014

26 The diagrams show some tissue types, in plant organs. W X Z Y Which row identifies the tissue types? W X Y Z A phloem phloem phloem xylem B phloem xylem phloem xylem C xylem phloem xylem phloem D xylem xylem phloem xylem

1 marks

Answer: A

This question in 9700/13 May/June 2014

27 Which features apply to both sieve tube elements and xylem vessel elements? 1 no cytoplasm 2 no end walls 3 no nucleus A 1, 2 and 3 B 1 and 3 only C 2 only D 3 only

1 marks

Answer: D

This question in 9700/13 May/June 2014

21 What is the main function of a companion cell in phloem tissue? A providing cytoplasmic contact with the sieve tube element for loading B providing structural support for the sieve tube element C providing the nucleus for cell division in the phloem D providing the source of assimilates for storage

1 marks

Answer: A

This question in 9700/11 Oct/Nov 2014

6 Which plan diagram of a transverse section of a dicotyledonous leaf correctly shows the position of xylem and phloem in a palisade mesophyll layer that is twice as thick as the spongy mesophyll layer? A B xylem phloem phloem xylem C D xylem phloem phloem xylem

1 marks

Answer: C

This question in 9700/12 Oct/Nov 2014

24 The diagram shows a transverse section of a stem. Which area is the phloem? A D C B

1 marks

Answer: B

This question in 9700/12 Oct/Nov 2014

28 The diagram shows the relationship between phloem sieve tube elements, xylem vessel elements and companion cells. 1 2 3 4 5 Which is correct? 1 2 3 4 5 A companion endoplasmic phloem sieve nucleus absent xylem vessel cells reticulum tube elements elements B companion nucleus phloem sieve cytoplasm xylem vessel cells tube elements elements C phloem sieve mitochondria companion nucleus xylem vessel tube elements cells elements D xylem vessel cytoplasm phloem sieve vacuole companion elements absent tube elements cells

1 marks

Answer: A

This question in 9700/12 Oct/Nov 2014

25 A group of students were asked to look at the photomicrograph of a cross-section of unfamiliar material and make observations. X They described X as 1 circular 2 a hollow tube 3 a spherical structure Which description(s) are correct? A 1, 2 and 3 B 1 and 2 only C 1 only D 3 only

1 marks

Answer: C

This question in 9700/13 Oct/Nov 2014

23 The diagram shows transverse sections of two plant structures. 1 2 3 4 Which row shows the correct labels? 1 2 3 4 A cuticle phloem xylem pith B cuticle xylem phloem cortex C epidermis phloem xylem cortex D epidermis xylem phloem pith

1 marks

Answer: C

This question in 9700/11 May/June 2015

25 The diagram shows a vascular bundle from the stem of a plant. 3 2 1 Which row describes the functions of the labelled cells? transports transports stores sucrose ions starch A 1 2 3 B 2 1 3 C 2 3 1 D 3 1 2

1 marks

Answer: B

This question in 9700/11 May/June 2015

23 Which features of these cells make them suitable for their function? companion cells xylem vessel elements A circulating contents lignified walls allow transport in provide support both directions B cellulose walls nuclei allow provide support cell division C nuclei allow gaps between cells cell division allow rapid transport D numerous mitochondria absence of cytoplasm supply energy allows mass flow

1 marks

Answer: D

This question in 9700/12 May/June 2015

23 The diagrams show transverse sections of parts of a plant. leaf stem root sox ‘ Oe aot 6 In the transverse sections, which tissues transport sucrose? 1 2 3 4 5 6 A Jv x v x x v key B J x x v x v v/=yes Cc x v v x v x xX =no D x v x v v x

1 marks

Answer: C

This question in 9700/12 Feb/March 2016

23 A student was asked to draw a plan diagram of the plant tissue shown in the photomicrograph and to annotate two observable features. What are correct annotations? A epidermis darkly stained layer of cells, xylem hollow vessels B epidermis formed of a single layer of cells, xylem strengthened by lignin C phloem small cells, xylem empty cells to transport water D vascular bundles arranged in a regular pattern, xylem large dead cells

1 marks

Answer: A

This question in 9700/11 May/June 2016

25 Which description is correct for xylem vessel elements? A cells joined to form a tube, pits at intervals, sieve plates between cells, surrounded by the endodermis in roots B contains cells joined end to end, containing cytoplasm, cell walls with lignin, located to the outside of phloem in vascular bundles C contains elongated cells with end walls broken down, located in vascular bundles in the stem and centrally in the roots D dead elongated cells, lignified cell walls with pits at intervals, associated with companion cells in the roots only

1 marks

Answer: C

This question in 9700/11 Oct/Nov 2016

24 The diagrams show transverse sections of parts of a plant. leaf stem root 3 1 4 5 6 2 In the transverse sections, which tissues transport water and which tissues transport sucrose? A 1 water 4 3 sucrose 6 B 2 water 3 4 sucrose 5 C 3 water 5 2 sucrose 6 D 4 water 6 2 sucrose 5

1 marks

Answer: D

This question in 9700/13 Oct/Nov 2016

26 Which parts of a plant have plasmodesmata? 1 companion cells 2 phloem sieve tube elements 3 root hair cell A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

1 marks

Answer: A

This question in 9700/13 Oct/Nov 2016

30 The diagrams show transverse sections of parts of a plant. leaf Which labelled structures transport mineral ions? 1 2 3 4 A Jv x v x key B v x x v v/=yes Cc x Jv J x xX =no D x v x v stem

1 marks

Answer: A

This question in 9700/12 Feb/March 2017

28 The diagrams represent transverse sections of three plant organs. 2 4 5 6 1 3 root stem leaf Which row is correct for phloem? root stem leaf A 1 3 5 B 1 4 6 C 2 3 6 D 2 4 5

1 marks

Answer: C

This question in 9700/11 May/June 2017

23 Which row is correct for a phloem sieve tube element? cell surface 80S cytoplasm nucleus membrane ribosomes A J J WA J B J J Jv x Cc Jv Jv x x D x x x x key J/ = present X = absent

1 marks

Answer: C

This question in 9700/12 May/June 2017

22 The diagrams show transverse sections of parts of a plant. leaf stem root Suen - , Oe bet 6 In the transverse sections, which tissues transport most amino acids? 1 2 3 4 5 6 A v x v x x v key B Jv x x Jv x Jv ¥ = transports most amino acids Cc x Jv Jv x Jv x X = does not transport most amino acids D x v x v v x

1 marks

Answer: C

This question in 9700/13 May/June 2017

27 The photomicrograph is a section through a plant organ. Which label identifies the xylem vessels? A B C D

1 marks

Answer: B

This question in 9700/13 Oct/Nov 2017

26 The photomicrograph shows a transport tissue in the stem of a grape vine. T What is the structure labelled T? A companion cell B sieve plate C sieve tube element D xylem vessel element

1 marks

Answer: B

This question in 9700/12 Feb/March 2018

27 The diagrams show transverse sections of parts of a plant. Transport tissues are labelled 1 to 6. leaf stem root 3 1 4 5 6 2 Which row shows tissues that mainly transport water and tissues that mainly transport sucrose? mainly transport mainly transport water sucrose A 1 and 3 4 and 6 B 2 and 3 4 and 5 C 3 and 5 2 and 6 D 4 and 6 2 and 3

1 marks

Answer: D

This question in 9700/12 Feb/March 2018

24 The photomicrograph shows tissues in a stained transverse section of a plant stem. Students are asked to draw four adjacent xylem vessel elements. Which drawing, all drawn to the same scale, is correct? A B C D

1 marks

Answer: D

This question in 9700/11 May/June 2018

28 Which combination of features is characteristic of a phloem sieve tube element as it is loaded from a source? water potential of lignification of the phloem sieve the cell wall tube element A higher than source absent B higher than source present C lower than source absent D lower than source present

1 marks

Answer: C

This question in 9700/12 May/June 2018

29 The diagrams show transverse sections of parts of a plant. Which structures, labelled 1 to 4, transport water and sucrose? 1 2 3 4 A Jv x v x key B v x x v ¥ = correct Cc x v v x X = incorrect D x v x v

1 marks

Answer: C

This question in 9700/12 May/June 2018

26 The photomicrograph shows a section through a plant organ. Which statement could be used to describe this organ? A The central region of this organ has supporting tissue. B The endodermis tissue is a thick layer around the edge of the organ. C The epidermis tissue in this organ has unicellular extensions (trichomes). D The xylem tissue is found in greatest density in the centre of the organ.

1 marks

Answer: C

This question in 9700/13 May/June 2018

27 Which diagram correctly represents part of a sieve tube element? A B lignified cell wall dense cytoplasm empty lumen nucleus sieve plate sieve plate C D tonoplast thin layer of cytoplasm vacuole cellulose cell wall sieve plate sieve plate

1 marks

Answer: D

This question in 9700/13 May/June 2018

25 The photomicrograph shows a transverse section through a root. What is the simplest ratio of the diameter of the root (excluding root hairs) to the diameter of the vascular tissue and endodermis? A 40 mm : 11 mm B 40 : 11 C 8 cm : 2.2 cm D 80 : 22

1 marks

Answer: B

This question in 9700/11 Oct/Nov 2018

25 Photomicrographs of a dicotyledonous plant root, stem and leaf are shown. 1 2 3 4 5 Which row is correct for the labels 1 to 5 on the photomicrographs? 1 2 3 4 5 A cortex phloem epidermis parenchyma endodermis B phloem parenchyma xylem epidermis cortex C phloem xylem endodermis cortex epidermis D xylem phloem endodermis cortex epidermis

1 marks

Answer: D

This question in 9700/12 Oct/Nov 2018

26 Which features apply to phloem sieve tube elements and to xylem vessel elements? 1 no cytoplasm 2 no end walls 3 no nucleus A 1, 2 and 3 B 1 and 3 only C 2 only D 3 only

1 marks

Answer: D

This question in 9700/12 Oct/Nov 2018

24 Four students were asked to suggest a set of four labels to add to a plan diagram of a transverse section of a dicotyledonous leaf. Which student suggested a correct set of labels? label 1 label 2 label 3 label 4 A lower phloem spongy palisade epidermis mesophyll mesophyll B phloem sieve upper spongy xylem vessel tubes epidermis mesophyll elements C spongy endodermis xylem vessel palisade mesophyll elements mesophyll D waxy cuticle xylem companion spongy cells mesophyll

1 marks

Answer: A

This question in 9700/13 Oct/Nov 2018

25 Photomicrograph X shows a transverse section through a typical stem. Photomicrograph Y shows a longitudinal section through one type of cell shown in photomicrograph X. Which letter represents the cells from photomicrograph Y? photomicrograph X photomicrograph Y A B C D

1 marks

Answer: C

This question in 9700/13 Oct/Nov 2018

25 The diagrams show transverse sections of parts of a plant with some transport tissues labelled from 1 to 6. leaf stem root 3 1 4 5 6 2 Which row shows tissues that mainly transport water and tissues that mainly transport sucrose? mainly transport mainly transport water sucrose A 1 and 3 4 and 6 B 1 and 6 3 and 5 C 2 and 3 4 and 5 D 3 and 5 2 and 6

1 marks

Answer: B

This question in 9700/12 Feb/March 2019

26 Which properties of lignin are important for the function of xylem vessels in the stem of a tall plant, such as a tree? 1 It is inflexible so does not bend easily. 2 It is not permeable to water. 3 It is strong to resist collapse under pressure. 4 It has weaker adhesion to water molecules than cellulose. A 1, 2 and 3 B 1, 2 and 4 C 1, 3 and 4 D 2, 3 and 4

1 marks

Answer: A

This question in 9700/12 Feb/March 2019

26 The photomicrograph shows a transverse section of part of a dicotyledonous leaf. 1 4 2 3 What are the correct labels for 1, 2, 3 and 4? 1 2 3 4 A phloem xylem palisade mesophyll spongy mesophyll B phloem xylem spongy mesophyll palisade mesophyll C xylem phloem palisade mesophyll spongy mesophyll D xylem phloem spongy mesophyll palisade mesophyll

1 marks

Answer: D

This question in 9700/11 May/June 2019

27 Some of the features present in transport tissues in plants are listed. 1 lignified walls 2 cytoplasm 3 mitochondria 4 pits 5 plasmodesmata Which of these features are present in phloem sieve tube elements? A 1, 2 and 5 B 1, 3 and 4 C 2, 3 and 5 D 2, 4 and 5

1 marks

Answer: C

This question in 9700/11 May/June 2019

28 The diagram shows the relationship between phloem sieve tube elements, xylem vessel elements and companion cells. 1 3 5 2 4 Which row is correct? 1 2 3 4 5 A companion endoplasmic phloem sieve no xylem vessel cells reticulum tube elements nucleus elements B companion nucleus phloem sieve cytoplasm xylem vessel cells tube elements elements C phloem sieve mitochondria companion nucleus xylem vessel tube elements cells elements D xylem vessel no phloem sieve vacuole companion elements cytoplasm tube elements cells

1 marks

Answer: A

This question in 9700/11 May/June 2019

23 The diagrams show transverse sections of parts of a plant. Transport tissues are labelled 1 to 6. leaf stem root Which combination shows the tissues that have a main function of transporting water? 1 2 3 4 5 6 A| Vv v x x v ¥ | key B J x x v x ¥ |= transporting water is a main function Cc x v v x v X | X =transporting water is not a main function D |X v x v v x

1 marks

Answer: B

This question in 9700/12 May/June 2019

24 The diagrams show some tissue types in plant organs. 1 2 4 3 Which row identifies the tissue types? 1 2 3 4 A phloem phloem phloem xylem B phloem xylem phloem xylem C xylem phloem xylem phloem D xylem xylem phloem xylem

1 marks

Answer: A

This question in 9700/11 Oct/Nov 2019

25 Which row correctly describes the adaptations of companion cells, phloem sieve tube elements and xylem vessel elements for their roles? companion cell phloem sieve tube element xylem vessel element A a thin layer of cytoplasm strong, lignified cell walls many plasmodesmata to reduce resistance to flow for supporting the plant for communication between cells B empty cells allowing many plasmodesmata strong, lignified cell walls water to flow freely for communication for supporting the plant between cells C many plasmodesmata a thin layer of cytoplasm empty cells allowing for communication to reduce resistance to flow water to flow freely between cells D strong, lignified cell walls empty cells allowing a thin layer of cytoplasm for supporting the plant water to flow freely to reduce resistance to flow

1 marks

Answer: C

This question in 9700/11 Oct/Nov 2019

24 The photomicrograph shows a vascular bundle. 1 3 2 Which describes the relationship of water potential in the labelled cells? A Cell 3 is less negative than cell 1. B Cell 2 is less negative than cell 3. C Cell 3 is more negative than cells 1 and 2. D Cells 1, 2 and 3 have the same water potential.

1 marks

Answer: A

This question in 9700/12 Oct/Nov 2019

24 Which row explains why xylem vessels have no cytoplasm? 0 0O WwW D> to contain a larger volume of water KS 4&4 to transport water faster ~« {Kw K& to increase the cellulose content of the vessel walls Ke 4 key / = explains X = does not explain

1 marks

Answer: C

This question in 9700/13 Oct/Nov 2019

25 The photomicrograph shows a section of a plant organ. Students were asked to study the photomicrograph and identify the organ, giving a reason to support their answer. Which statement written by the students correctly identifies the organ and provides a correct reason to support this identification? A It is a leaf because the xylem is located on the inner side of each vascular bundle. B It is a stem because there is a ring of endodermis visible around the edge of the vascular tissue. C It is a stem because the vascular bundles are arranged in a ring near the epidermis. D It is a xerophytic leaf because there is a thick epidermis made up of many layers of cells.

1 marks

Answer: C

This question in 9700/12 Feb/March 2020

24 A dicotyledonous leaf has a palisade mesophyll layer that is approximately twice as thick as the spongy mesophyll layer. Which plan diagram is correct? A B upper surface upper surface of leaf of leaf xylem phloem phloem xylem C D upper surface upper surface of leaf of leaf xylem phloem phloem xylem

1 marks

Answer: C

This question in 9700/11 May/June 2020

26 The photomicrograph shows a transverse section through a leaf. ×50 Which features of a xerophytic leaf are visible in this section? 1 sunken stomata 2 two layers of epithelium 3 thick cuticle 4 small surface area to volume A 1, 2, 3 and 4 B 1 and 2 only C 1 and 3 only D 3 and 4 only

1 marks

Answer: C

This question in 9700/12 May/June 2020

24 The diagrams show transverse sections through parts of plants. Which of the labelled regions contains cells which are dead? C A D B

1 marks

Answer: A

This question in 9700/13 May/June 2020

25 The diagram shows the distribution of tissues in part of a transverse section through a plant organ. 1 2 3 Which row correctly identifies tissues 1, 2 and 3? 1 2 3 A cortex endodermis phloem B cortex epidermis xylem C endodermis epidermis pith D pith endodermis phloem

1 marks

Answer: A

This question in 9700/13 May/June 2020

23 The photograph shows a section of a stem. Which labelled part is the xylem? B A C D

1 marks

Answer: C

This question in 9700/11 Oct/Nov 2020

25 Some of the features present in transport tissues in plants are listed. 1 lignified walls 2 cytoplasm 3 many mitochondria 4 pits 5 plasmodesmata 6 sieve plates Which of these features are present in xylem vessel elements? A 1, 2, 4 and 5 B 1 and 4 only C 2, 3, 5 and 6 D 2, 3 and 5 only

1 marks

Answer: B

This question in 9700/13 Oct/Nov 2020

24 Which descriptions apply to phloem sieve tube elements and to xylem vessel elements? 1 no cytoplasm 2 no end walls 3 no nucleus A 1, 2 and 3 B 1 and 3 only C 2 only D 3 only

1 marks

Answer: D

This question in 9700/12 Feb/March 2021

25 The diagram shows a transverse section of a stem. Which area is the phloem? A D C B

1 marks

Answer: B

This question in 9700/11 May/June 2021

23 Which descriptions of the adaptations of xylem vessel elements to their function are correct? 1 They have pits between vessels allowing water to pass from one vessel to another. 2 They are thickened with lignin to stop them collapsing when the column of water is under tension. 3 They form a continuous hollow tube through the plant providing little resistance to water movement. A 1, 2 and 3 B 1 and 3 only C 2 only D 2 and 3 only

1 marks

Answer: A

This question in 9700/12 May/June 2021

26 Which statements explain why a stem is cut under water and connected to a potometer under water? 1 to prevent plasmolysis of xylem vessel elements 2 to prevent the collapse of xylem vessel elements 3 to prevent air entering xylem vessel elements A 1, 2 and 3 B 2 and 3 only C 1 only D 3 only

1 marks

Answer: D

This question in 9700/13 May/June 2021

25 The table shows the observations made by a student about three different cell types, P, Q and R, seen in a transverse section of a plant stem, using a light microscope. ratio of cell wall width to whole structures observed in cell contents cell width P 1 : 10 none Q 1 : 20 regular pattern of circles in some cells R 1 : 20 granular appearance of all cells What type of cells are P, Q and R? P Q R A companion cell phloem sieve tube element xylem vessel element B companion cell xylem vessel element phloem sieve tube element C xylem vessel element companion cell phloem sieve tube element D xylem vessel element phloem sieve tube element companion cell

1 marks

Answer: D

This question in 9700/11 Oct/Nov 2021

24 Which features of companion cells are essential to their function? 1 They are connected to the sieve tube elements by plasmodesmata. 2 They have a thicker cell wall than a sieve tube element. 3 They contain a nucleus and mitochondria. A 1 and 2 B 1 and 3 C 1 only D 2 and 3

1 marks

Answer: B

This question in 9700/12 Oct/Nov 2021

23 The diagram shows a vascular bundle from the stem of a plant. 3 2 1 Which row describes the functions of the labelled cells? transports transports stores sucrose mineral ions starch A 1 2 3 B 2 1 3 C 2 3 1 D 3 1 2

1 marks

Answer: B

This question in 9700/13 Oct/Nov 2021

24 Some of the features present in the transport tissues of plants are listed. 1 lignified walls 2 cytoplasm 3 mitochondria 4 chloroplasts 5 plasmodesmata Which features are present in sieve tube elements? A 1, 2 and 5 B 1, 3 and 4 C 2, 3 and 5 D 2, 4 and 5

1 marks

Answer: C

This question in 9700/13 Oct/Nov 2021

26 The diagram shows the relationship between phloem sieve tube elements, xylem vessel elements and companion cells. 1 3 5 2 4 Which row correctly identifies what could be represented by the numbers 1, 2, 3, 4 and 5? 1 2 3 4 5 A companion endoplasmic phloem sieve no xylem vessel cells reticulum tube elements nucleus elements B companion nucleus phloem sieve cytoplasm xylem vessel cells tube elements elements C phloem sieve mitochondria companion nucleus xylem vessel tube elements cells elements D xylem vessel no phloem sieve vacuole companion elements cytoplasm tube elements cells

1 marks

Answer: A

This question in 9700/12 Feb/March 2022

24 Some of the features present in transport tissues are listed. 1 lignified walls 2 cytoplasm 3 mitochondria 4 pits 5 plasmodesmata Which features are present in xylem vessel elements? A 1, 2, 3 and 4 B 1, 4 and 5 C 1 and 4 only D 2, 3 and 5

1 marks

Answer: C

This question in 9700/12 May/June 2022

25 The diagrams show transverse sections through parts of plants. 3 1 4 5 6 2 Which row is correct? transports contains lignin organic solutes A 1, 4, 5 2, 3, 6 B 1, 4, 6 2, 3, 5 C 2, 3, 5 1, 4, 6 D 2, 4, 6 1, 3, 5

1 marks

Answer: B

This question in 9700/12 May/June 2022

26 The diagram shows a plant organ. Which letter correctly labels the xylem? B A C D

1 marks

Answer: D

This question in 9700/13 May/June 2022

27 The photomicrograph shows a vascular bundle found in a plant organ. X Y Which statements about this vascular bundle are correct? 1 The vascular bundle is part of the structure of a root. 2 Some of the cells in region X have very large numbers of mitochondria. 3 Region Y is made up of a number of different cell types. A 1 and 2 B 1 only C 2 and 3 D 3 only

1 marks

Answer: C

This question in 9700/13 May/June 2022

27 The diagrams show some tissue types in plant organs. 1 2 4 3 Which row identifies the tissue types? 1 2 3 4 A phloem phloem phloem xylem B phloem xylem phloem xylem C xylem phloem xylem phloem D xylem xylem phloem xylem

1 marks

Answer: A

This question in 9700/11 Oct/Nov 2022

28 Which description of xylem vessel elements is correct? A cells joined to form a tube, pits at intervals, sieve plates between cells, surrounded by the endodermis in roots B contains cells joined end to end, containing cytoplasm, cell walls with lignin, located to the outside of phloem in vascular bundles C contains elongated cells with end walls broken down, located in vascular bundles in the stem and leaves D dead elongated cells, lignified cell walls with pits at intervals, associated with companion cells in the roots only

1 marks

Answer: C

This question in 9700/11 Oct/Nov 2022

29 Which properties of lignin are important for the function of xylem vessels in the stem of a tall plant, such as a tree? 1 It is inflexible so does not bend easily. 2 It is not permeable to water. 3 It is strong to resist collapse under pressure. 4 It has weaker adhesion to water molecules than cellulose. A 1, 2 and 3 B 1, 2 and 4 C 1, 3 and 4 D 2, 3 and 4

1 marks

Answer: A

This question in 9700/11 Oct/Nov 2022

26 The electron micrograph shows a longitudinal section through part of a plant stem. X What is X? A xylem vessel element B stem cell C phloem sieve tube element D companion cell

1 marks

Answer: D

This question in 9700/12 Oct/Nov 2022

26 The photomicrograph shows a section through a plant organ. Which statement could be used to describe this organ? A The central region of this organ has supporting tissue. B The endodermis tissue is a thick layer around the edge of the organ. C The epidermis tissue in this organ has extensions (trichomes). D The xylem tissue is found in greatest density in the centre of the organ.

1 marks

Answer: C

This question in 9700/13 Oct/Nov 2022

25 Which row correctly matches the structure and function of phloem sieve tube elements? structure function A peripheral cytoplasm to provide as little resistance with no nucleus to flow as possible B end walls modified to to slow down the rate of form sieve plates transport of solutes C elongated cells joined to form a tube to transport end to end dissolved mineral ions and water D cellulose cell wall with no lignin to prevent loss of water

1 marks

Answer: A

This question in 9700/12 Feb/March 2023

26 Which feature of xylem vessel elements helps adhesion during transpiration? A Lignin forms a complete secondary wall. B New vessels carry extra water as the plants grow. C There are no cross walls between vessel elements. D The vessel elements form a narrow tube.

1 marks

Answer: D

This question in 9700/12 Feb/March 2023

23 Which structures contain cytoplasm with mitochondria and a nucleus? xylem vessel element B companion phloem cell A C sieve tube D element

1 marks

Answer: A

This question in 9700/11 May/June 2023

26 Which row identifies cells with plasmodesmata? phloem sieve tube element companion cell xylem vessel element Jv v Jv key / = plasmodesmata present X = plasmodesmata not present v v x v x v x v v

1 marks

Answer: B

This question in 9700/12 May/June 2023

27 Which row correctly explains how the structures of phloem sieve tube elements and xylem vessel elements are related to their functions as transport systems? phloem sieve tube elements xylem vessel elements A contain mitochondria to make ATP cell walls are thickened and for the active loading of sucrose contain lignin which makes into the phloem xylem vessels waterproof B contain no nucleus so that end walls between cells are dissolved solutes can move easily perforated so that water can move through cells easily through xylem vessels C end walls between cells are lignin in cell walls gives strength so perforated so that dissolved solutes that xylem vessels do not collapse can move between cells due to transpiration pull D no end walls between cells so that contain no cytoplasm so that a sucrose solution can move up and continuous column of water can down the phloem move up the xylem vessels

1 marks

Answer: C

This question in 9700/13 May/June 2023

25 Which statement about xylem vessel elements is correct? A Hollow vessels enable the constant movement of water up and down a plant. B Pits enable the movement of water into adjacent xylem vessels. C Vessels contain numerous mitochondria to generate ATP for active transport. D Vessels contain perforated cross-walls called sieve plates.

1 marks

Answer: B

This question in 9700/13 Oct/Nov 2023

28 Which statement correctly describes the association between a companion cell and its sieve tube cell? A The companion cell provides all of the ATP used for energy-requiring processes in both types of cell. B The companion cell controls the active transport of molecules through the sieve plates. C The companion cell prevents side-to-side movement of assimilates between sieve tube cells. D The companion cell provides a nucleus that controls cellular activities in both types of cell.

1 marks

Answer: D

This question in 9700/12 Feb/March 2024

24 The electron micrograph shows a longitudinal section of part of the stem of a plant. X What is the name of the structure labelled X? A companion cell B Casparian strip C phloem sieve tube element D xylem vessel element

1 marks

Answer: C

This question in 9700/11 May/June 2024

25 Which substance makes xylem vessel walls impermeable to water? A cellulose B lignin C suberin D collagen

1 marks

Answer: B

This question in 9700/11 May/June 2024

25 The diagram shows a transverse section through a transport tissue in a plant. 1 2 Which row correctly identifies cell 1 and cell 2? cell 1 cell 2 A companion cell phloem sieve tube element B companion cell xylem vessel element C phloem sieve tube element phloem sieve tube element D phloem sieve tube element xylem vessel element

1 marks

Answer: A

This question in 9700/12 May/June 2024

26 Which substances in xylem tissue are impermeable to water and prevent the collapse of the vessels? impermeable to water prevent collapse A cellulose cellulose only B cellulose lignin only C lignin cellulose only D lignin cellulose and lignin

1 marks

Answer: D

This question in 9700/13 May/June 2024

27 The electron micrograph shows a longitudinal section through phloem tissue. Which student’s drawing of a sieve tube element is correctly drawn and labelled? A B mitochondrion cell wall sieve sieve plate plate C D cell cell wall wall cytoplasm cytoplasm sieve sieve plate plate mitochondrion

1 marks

Answer: C

This question in 9700/13 May/June 2024

28 Xylem vessel elements are specialised cells that are adapted for the transport of water. Which statement correctly matches an adaptation of a xylem vessel element to its function? A Cytoplasm is only found in a thin layer next to the cell walls and does not contain any organelles. This reduces resistance to the flow of water in the xylem vessels. B The end walls between xylem vessel elements have partially broken down, forming end plates. This reduces resistance to the flow of water in the xylem vessel. C The walls of the xylem vessel elements contain cellulose that is hydrophilic and can form hydrogen bonds to water, allowing adhesion of water molecules to the vessel walls. D Xylem vessel elements have plasmodesmata that connect them with companion cells. The companion cells provide ATP, which is needed for the transport of water.

1 marks

Answer: C

This question in 9700/11 Oct/Nov 2024

29 A student makes an accurate labelled plan diagram of a section of a leaf containing a vascular bundle. Which statement correctly describes part of their plan diagram? A The vascular bundle has labels for the xylem vessel elements, phloem sieve tube elements and companion cells. B The vascular bundle is divided into two sections, with the section closer to the upper epidermis labelled as xylem and the other section labelled as phloem. C In the section of the vascular bundle positioned closer to the lower epidermis, each sieve tube element has an associated companion cell. D The phloem sieve tube elements are drawn with thick cell walls to represent the lignin in the walls.

1 marks

Answer: B

This question in 9700/11 Oct/Nov 2024

26 A student drew a plan diagram of some plant tissue. The diagram is shown. It contains a mistake in the way that it is drawn. R The maximum width of R is 15 mm on the diagram and its actual width is 250 m. The student was asked to draw a scale bar on their diagram. Which row is correct? length of scale bar part of the location of in mm to correctly plant drawn drawing mistake represent 100 m A root phloem 6 B root xylem 170 C stem phloem 170 D stem xylem 6

1 marks

Answer: D

This question in 9700/13 Oct/Nov 2024

27 Four students have drawn and labelled part of a structure seen on an electron micrograph. Which student has labelled their drawing correctly? A B vacuole mitochondria mitochondria sieve plate sieve plate thin cytoplasm C D nucleus chloroplast sieve plate sieve plate thin cytoplasm thin cytoplasm

1 marks

Answer: A

This question in 9700/13 Oct/Nov 2024

27 Which row correctly matches each description to cilia or root hairs? more than contain one present vacuoles per cell A root hairs root hairs B cilia cilia C root hairs cilia D cilia root hairs

1 marks

Answer: C

This question in 9700/12 Feb/March 2025

27 Which features of companion cells and xylem vessel elements make them suitable for their function? companion cells xylem vessel elements A transport contents of lignified walls cell in one direction only provide support B cellulose walls nuclei allow provide support cell division C nuclei allow gaps between cells cell division allow rapid transport D numerous mitochondria absence of cytoplasm supply energy allows mass flow

1 marks

Answer: D

This question in 9700/12 May/June 2025

27 The photomicrograph shows a section of vascular tissue from the stem of a plant. ×80 Which description of this photomicrograph is correct? A a transverse section showing xylem tissue B a longitudinal section showing xylem tissue C a transverse section showing phloem tissue D a longitudinal section showing phloem tissue

1 marks

Answer: D

This question in 9700/13 May/June 2025

30 Which features are present in companion cells and also in phloem sieve tube elements? ribosomes plasmodesmata v x key / = present 0 0O WwW > v v x v X = not present x x

1 marks

Answer: B

This question in 9700/14 May/June 2025

26 The diagram shows a vertical section through part of the stem of a dicotyledonous plant. Three types of structures are labelled. U V W What are the structures U, V and W? companion phloem sieve xylem vessel cells tube elements elements A U W V B V U W C U V W D W V U

1 marks

Answer: B

This question in 9700/11 Oct/Nov 2025

27 Which features of xylem vessels help to reduce the resistance to water flow? 1 Lignin forms an incomplete secondary wall. 2 There are no cross walls between the vessel elements. 3 The xylem vessels form narrow tubes. A 1, 2 and 3 B 1 and 2 only C 2 only D 3 only

1 marks

Answer: C

This question in 9700/11 Oct/Nov 2025

28 The photomicrograph shows a longitudinal section of part of a plant stem. P Q R Which row correctly identifies structures P, Q and R? P Q R A phloem sieve companion cell xylem vessel tube element element B phloem sieve xylem vessel companion cell tube element element C xylem vessel phloem sieve companion cell element tube element D xylem vessel companion cell phloem sieve element tube element

1 marks

Answer: C

This question in 9700/13 Oct/Nov 2025