Coordination and response — Paper 2 · IGCSE Sciences - Co-ordinated (9-1) 0973

9 What occurs when our eyes look from a near object in dim light to a distant object in bright light? A Pupils constrict and lenses become thinner. B Pupils constrict and lenses become fatter. C Pupils dilate and lenses become thinner. D Pupils dilate and lenses become fatter.

1 marks

Answer: A

This question in 0973/21 May/June 2019

9 What occurs when our eyes look from a near object in dim light to a distant object in bright light? A Pupils constrict and lenses become thinner. B Pupils constrict and lenses become fatter. C Pupils dilate and lenses become thinner. D Pupils dilate and lenses become fatter.

1 marks

Answer: A

This question in 0973/22 May/June 2019

9 Which row is correct when looking at a near object? ciliary suspensory lens muscles ligaments A contracted slack fat B contracted tight thin C relaxed slack thin D relaxed tight fat

1 marks

Answer: A

This question in 0973/21 Oct/Nov 2020

9 A person touches a hot object with their hand. They quickly pull their hand away. Which statement is correct? A The effector is their hand. B The effector is the hot object. C The receptor is in the muscles of their arm. D The receptor is in the skin of their hand.

1 marks

Answer: D

This question in 0973/21 Oct/Nov 2021

9 A person who is red-green colour blind cannot distinguish between red and green colours. Which part of the eye is responsible for this? A cornea B iris C lens D retina

1 marks

Answer: D

This question in 0973/22 May/June 2022

9 When a seed germinates in the soil, the root grows downwards. Which type of response is the root exhibiting? A negative gravitropism B negative phototropism C positive gravitropism D positive phototropism

1 marks

Answer: C

This question in 0973/21 Oct/Nov 2022

9 What is the function of the cornea? A It carries impulses to the brain. B It controls how much light enters the pupil. C It focuses light onto the retina. D It refracts light.

1 marks

Answer: D

This question in 0973/21 May/June 2023

9 The diagram shows an experiment using the shoots of seedlings. light control shoot shoot five at start days later light lightproof cover shoot five placed over shoot tip days later at start Which statement explains why the covered shoot tip does not grow towards the light? A The lightproof cover decreases auxin production by the shoot tip. B The lightproof cover keeps auxin distribution even on all sides of the shoot. C The lightproof cover prevents auxin from diffusing from the shoot tip. D The lightproof cover stimulates cell elongation without requiring auxin.

1 marks

Answer: B

This question in 0973/22 May/June 2023

9 During an experiment, auxin is applied to one side of a shoot just behind the tip. What will this stimulate? A decreased cell elongation in all cells B decreased cell elongation on the side with extra auxin C increased cell elongation in all cells D increased cell elongation on the side with extra auxin

1 marks

Answer: D

This question in 0973/21 Oct/Nov 2023

9 A person looks at a tree in the distance and then starts to read a book. Which changes occur in the eye to enable the person to read their book? suspensory ciliary muscles lens ligaments A contract slacken becomes fatter B contract tighten becomes thinner C relax slacken becomes fatter D relax tighten becomes thinner

1 marks

Answer: A

This question in 0973/21 May/June 2024

9 A person touches a hot object and pulls their hand away. This is a reflex action. What is the pathway for the reflex action? A stimulus  motor neurone  relay neurone  sensory neurone  response B stimulus  relay neurone  motor neurone  sensory neurone  response C stimulus  sensory neurone  relay neurone  motor neurone  response D stimulus  sensory neurone  motor neurone  relay neurone  response

1 marks

Answer: C

This question in 0973/22 May/June 2024

9 A student looks at an object at a distance and then looks at an object close by. This ability to focus on both objects is brought about by changing the shape of the lens. What is this called? A accommodation B coordination C pupil reflex D transmission

1 marks

Answer: A

This question in 0973/21 Oct/Nov 2024

1 When light shines from one direction only, a plant shoot bends towards the light. light Which row gives the characteristics of living organisms shown by the plant shoot? growth movement sensitivity A no yes yes B yes yes no C yes no yes D yes yes yes

1 marks

Answer: D

This question in 0973/21 Oct/Nov 2025