Transpiration — Paper 2 · IGCSE Sciences - Co-ordinated (Double) 0654

12 Water enters root hair cells from the soil. What happens to most of this water after it has entered the cells? A It is used in photosynthesis in the root cells. B It moves out again when the soil is dry. C It moves to the leaves and is lost by transpiration. D The cell uses it in respiration.

1 marks

Answer: C

This question in 0654/21 Oct/Nov 2017

4 Water is taken in through the roots and lost from the leaves of tall trees. What enables this to happen? A active transport by the xylem vessels B pressure from the roots C translocation in the phloem D transpiration loss from the leaves

1 marks

Answer: D

This question in 0654/21 Oct/Nov 2018

5 Water is taken in through the roots and lost from the leaves of tall trees. What enables this to happen? A active transport by the xylem vessels B pressure from the roots C translocation in the phloem D transpiration loss from the leaves

1 marks

Answer: D

This question in 0654/22 Oct/Nov 2018

5 Water is taken in through the roots and lost from the leaves of tall trees. What enables this to happen? A active transport by the xylem vessels B pressure from the roots C translocation in the phloem D transpiration loss from the leaves

1 marks

Answer: D

This question in 0654/23 Oct/Nov 2018

7 Under which conditions will transpiration from a plant be fastest? temperature humidity A high high B high low C low high D low low

1 marks

Answer: B

This question in 0654/21 Oct/Nov 2020

7 Under which conditions will transpiration from a plant be fastest? temperature humidity A high high B high low C low high D low low

1 marks

Answer: B

This question in 0654/22 Oct/Nov 2020

7 Under which conditions will transpiration from a plant be fastest? temperature humidity A high high B high low C low high D low low

1 marks

Answer: B

This question in 0654/23 Oct/Nov 2020

7 In which weather conditions is the rate of transpiration fastest? A cold and dry B cold and wet C warm and dry D warm and wet

1 marks

Answer: C

This question in 0654/22 Feb/March 2021

7 A student investigates the effect of humidity on transpiration rate. A plant is placed on a balance as shown for one hour. The mass of the plant decreases. plant polythene bag plant pot balance 1423 The student repeats the experiment in air of higher humidity. What is the effect of increasing humidity? A larger decrease in mass due to a steeper diffusion gradient of water B larger decrease in mass due to a less steep diffusion gradient of water C smaller decrease in mass due to a steeper diffusion gradient of water D smaller decrease in mass due to a less steep diffusion gradient of water

1 marks

Answer: D

This question in 0654/21 May/June 2021

7 Which graph shows the effect of atmospheric humidity on the rate of transpiration if all other factors are kept constant? A B rate of rate of transpiration transpiration humidity humidity C D rate of rate of transpiration transpiration humidity humidity

1 marks

Answer: D

This question in 0654/22 May/June 2021

7 Where does evaporation of water occur during transpiration? A from the air spaces through the stomata B from the phloem C from the surfaces of mesophyll cells D from the xylem

1 marks

Answer: C

This question in 0654/21 May/June 2022

7 Which statement explains the effect of a higher temperature on the rate of transpiration? A More water evaporates from the stomata, creating a water potential gradient that draws a column of water molecules up the xylem. B Less water evaporates from the stomata, creating a water potential gradient that draws a column of water molecules up the xylem. C More water evaporates from the stomata, creating a water potential gradient that draws a column of water molecules up the phloem. D Less water evaporates from the stomata, creating a water potential gradient that draws a column of water molecules up the phloem.

1 marks

Answer: A

This question in 0654/22 Oct/Nov 2022

7 Which cells lose water by evaporation from their surfaces during transpiration? A epidermis cells B guard cells C mesophyll cells D root hair cells

1 marks

Answer: C

This question in 0654/23 May/June 2023

7 The rates of water uptake and loss are measured in four leaves. The results are shown in the table. Which leaf is least likely to wilt? rate of water uptake rate of water loss / mm3 per minute / mm3 per minute A 8 15 B 9 11 C 12 13 D 15 10

1 marks

Answer: D

This question in 0654/22 Oct/Nov 2023

7 Which statement is correct? A Xylem vessels are living and are involved in translocation. B Xylem vessels are living and are involved in transpiration. C Xylem vessels are dead and are involved in translocation. D Xylem vessels are dead and are involved in transpiration.

1 marks

Answer: D

This question in 0654/22 Feb/March 2024

7 A student investigates the effect of humidity on transpiration rate. A plant is placed on a balance for one hour as shown. The mass of the plant decreases. plant polythene bag plant pot balance 1423 The student repeats the experiment in air of higher humidity. What is the effect of increasing humidity? A larger decrease in mass due to a steeper diffusion gradient of water B larger decrease in mass due to a less steep diffusion gradient of water C smaller decrease in mass due to a steeper diffusion gradient of water D smaller decrease in mass due to a less steep diffusion gradient of water

1 marks

Answer: D

This question in 0654/21 May/June 2024

7 Which graph shows the effect of humidity on the rate of transpiration? A B rate of rate of transpiration transpiration humidity humidity C D rate of rate of transpiration transpiration humidity humidity

1 marks

Answer: C

This question in 0654/22 May/June 2024

7 In which weather conditions is the rate of transpiration fastest? A cold and dry B cold and wet C warm and dry D warm and wet

1 marks

Answer: C

This question in 0654/21 Oct/Nov 2024

8 Which row shows the conditions that will increase the rate of transpiration from a plant? temperature humidity A high low B high high C low high D low low

1 marks

Answer: A

This question in 0654/22 May/June 2025

5 More stomata are found on the lower surfaces of leaves than on the upper surfaces of leaves. A student puts petroleum jelly on the surfaces of four leaves. ● One leaf has petroleum jelly on the upper surface. ● One leaf has petroleum jelly on the lower surface. ● One leaf has petroleum jelly on both surfaces. ● One leaf has petroleum jelly on neither surface. The leaves are weighed and left in the air for one week before being weighed again. The percentage decrease in mass of each of the leaves is shown in the table. percentage leaf decrease in mass W 45 X 12 Y 17 Z 42 Which leaf has petroleum jelly on its lower surface only? A W B X C Y D Z

1 marks

Answer: C

This question in 0654/23 May/June 2025