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

9 In a reflex arc, which structure carries nerve impulses towards the central nervous system? A effector B motor neurone C sensory neurone D spinal cord

1 marks

Answer: C

This question in 0973/11 May/June 2019

9 A plant shoot grows towards a light source. This is an example of what? A gravitropism B homeostasis C transpiration D phototropism

1 marks

Answer: D

This question in 0973/11 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 0973/11 Oct/Nov 2021

9 A plant in a pot is placed on its side in a dark cupboard. The shoots grow upwards. What is this an example of? A decomposition B gravitropism C photosynthesis D phototropism

1 marks

Answer: B

This question in 0973/11 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 0973/11 Oct/Nov 2022

9 A person leaves an air conditioned building. The temperature of the air conditioned building is 16 °C. The outside temperature is 39 °C. Which statement describes one response to the change in temperature? A The blood detects the change in temperature and the person starts to shiver. B The blood detects the change in temperature and the person starts to sweat. C The brain detects the change in temperature and the person starts to shiver. D The brain detects the change in temperature and the person starts to sweat.

1 marks

Answer: D

This question in 0973/12 May/June 2023

9 A plant is placed in a box. The box has a hole so that the plant is illuminated from one side. The plant is observed after one week. The result is shown. light light at start after one week What explains the growth of the plant after one week? A Plant shoots grow towards light, showing phototropism. B Plant shoots grow towards gravity, showing gravitropism. C Plant shoots grow towards light, showing gravitropism. D Plant shoots grow towards gravity, showing phototropism.

1 marks

Answer: A

This question in 0973/11 May/June 2024

1 Which two characteristics of living organisms are demonstrated by gravitropism? A growth and nutrition B growth and sensitivity C respiration and nutrition D respiration and sensitivity

1 marks

Answer: B

This question in 0973/12 May/June 2024

9 In which order does an impulse pass along neurones during a reflex action? A motor  relay  sensory B motor  sensory  relay C sensory  motor  relay D sensory  relay  motor

1 marks

Answer: D

This question in 0973/11 Oct/Nov 2024

11 Which row shows effects of adrenaline? heart rate pupil diameter A increases increases B increases no effect C decreases increases D no effect increases

1 marks

Answer: A

This question in 0973/11 May/June 2025

1 The Venus fly trap is a plant that catches insects. Which characteristic of living organisms is shown in the diagram? A excretion B growth C reproduction D sensitivity

1 marks

Answer: D

This question in 0973/12 May/June 2025

10 The diagram shows three types of neurone. P Q R Which order do impulses pass through the neurones in a reflex action? A P  R  Q B Q  P  R C R  P  Q D R  Q  P

1 marks

Answer: C

This question in 0973/12 May/June 2025

11 Which structures make up the mammalian nervous system? A brain, muscles, impulses B brain, nerves, spinal cord C effectors, muscles, spinal cord D impulses, effectors, nerves

1 marks

Answer: B

This question in 0973/11 Oct/Nov 2025