Tropic responses

The diagram illustrates an experiment designed to explore how a plant stem responds to gravity. What would be an appropriate control for this experiment?

Feb/March 2016

The diagram illustrates an experiment used to study how a plant stem responds to gravity. What would be an appropriate control for this experiment?

Feb/March 2016

Which of these statements correctly describes the growth response of a plant shoot?

Feb/March 2017

The diagram illustrates an experiment that uses wheat shoot tips to investigate plant growth. Which statement is supported by the evidence from this experiment?

Feb/March 2018

2,4-D is a synthetic plant auxin used as a weedkiller. Researchers tested how effective different 2,4-D treatments were at controlling the weed Conyza canadensis in maize, Zea mays, fields. The findings are given in Table 5.1.

Feb/March 2018

The diagram illustrates an experiment using oat seedlings. Every seedling receives light from overhead. Which seedling will grow towards the left?

Feb/March 2019

What is a typical example of phototropism?

Feb/March 2020

The diagram illustrates a shoot bending towards light. Which statement correctly describes auxin’s role in phototropism?

Feb/March 2020

The diagram depicts a seedling growing in a pot in the light. The pot was then laid on its side in a dark room. What will the seedling look like after 48 hours?

Feb/March 2021

The diagram shows a seedling growing within a dark box. What type of responses determine the direction of growth of the root and the shoot inside the box?

Feb/March 2023

The diagram shows a seedling growing in a dark box. Which kind of responses influence the direction in which the root and the shoot grow inside the box?

Feb/March 2023

The diagram illustrates the shoot and root of a seedling as they respond to gravity. Which row indicates where auxin builds up and the resulting effect in the shoot?

Feb/March 2024

State the name of the growth response shown by the plant shoot in Fig. 3.1.

Feb/March 2024

Tropic responses may be either positive or negative. If a plant grows towards the stimulus, the response is positive (+). If a plant grows away from the stimulus, the response is negative (-). The diagram shows a plant showing tropic responses. Which row gives the tropic responses at position M and at position N?

Feb/March 2025

When it is dark, why do plant shoots grow upward while roots grow downward?

Feb/March 2025

Give one example of gravitropism.

May/June 2016

Fig. 2.1 is a flow chart showing the sequence of events that happens as light passes through the eye.

May/June 2016

The diagram illustrates a plant shoot growing towards light. Which response is displayed by the plant shoot?

May/June 2017

The diagram shows a seedling placed in a pot filled with soil. Which diagram shows what will be seen after five days?

May/June 2017

What does the term phototropism mean?

May/June 2017

What does the term phototropism mean?

May/June 2017

Fig. 6.1 is a sketch of a seed that has germinated. Fig. 6.2 shows the equipment arranged by a student to study seed germination.

May/June 2017

Fig. 6.1 depicts a plant that is growing in darkness. The pot has toppled over and has remained on its side for several days.

May/June 2017

The diagram shows a seedling growing inside a dark box. Which kind of responses control the direction in which the root and the shoot grow in this experiment?

May/June 2018

A seed is positioned and allowed to grow on a rotating disc, as shown. Which diagram shows what the seedling shoot looks like after seven days?

May/June 2018

A seedling was positioned horizontally. Which diagram illustrates the outcome of gravitropic responses in the seedling?

May/June 2018

A plant shoot is used in an experiment on phototropism, with light directed at it from only one side. After two days, in which region would the highest rate of growth be found?

May/June 2018

The tips of three plant shoots are cut off. A piece of agar gel is then placed on two of the shoots, as shown in the diagram. The agar gel contains auxin. The shoots are kept under light from one side. What will the shoots look like after two days?

May/June 2019

The diagram illustrates a plant beside a window. Which statement accounts for the growth of the plant shoot?

May/June 2021

Two matching potted plants were set up to investigate how plants respond. Plant A was mounted on a clinostat and kept rotating continuously, while Plant B was left unrotated. Both plants were then laid on their sides and kept in darkness. Fig. 4.1 shows the two plants at the beginning of the investigation and after seven days.

May/June 2021

Which statement gives the description of the plant response called phototropism?

May/June 2022

An experiment was arranged to study shoot growth under different conditions, as shown. Which diagram shows the results that would be observed a few days later?

May/June 2022

A young maize seedling develops from a seed. The seedling is laid on its side and kept in a room that has a light source for several days. What will happen to the young shoot?

May/June 2022

A student looked into how plants respond in growth. A seedling was fastened to a support stand and positioned beneath a lamp.

May/June 2022

Which words finish the statements? The name for plant growth in the direction of light is ......1...... . If a plant shoot grows towards a light source, this shows a ......2...... to light. Light is the ......3...... .

May/June 2023

The diagram shows seedlings in two experiments on the tropic response of seedlings to gravity and light. To which stimuli have the seedlings responded?

May/June 2023

Which statement about auxin in shoots is correct?

May/June 2023

Which pattern of auxin distribution will make the shoot tip grow towards the light?

May/June 2023

A seedling is a seed that has only just begun to grow, producing a tiny root and a tiny shoot.

May/June 2023

A student explored how roots and shoots respond to gravity in plant growth. The procedure was carried out like this: damp cotton wool was put into two Petri dishes; in each Petri dish, three bean seedlings were fixed onto the cotton wool; each seedling in a dish was set so that its roots faced a different direction; Petri dish 1 was left on its side and held in a fixed position; Petri dish 2 was left on its side and kept rotating continuously; both dishes were kept in the dark; both dishes remained in these conditions for two days; after two days, the seedlings were examined. Fig. 6.1 is a diagram of the apparatus. Fig. 6.2 shows the seedlings after two days.

May/June 2023

A plant pot lies on its side. Which diagram shows a plant whose roots display gravitropism and whose shoots display phototropism?

May/June 2024

The diagram illustrates the result of an experiment involving plant seedlings. Which characteristic of living things caused the seedlings to grow towards the light?

May/June 2024

A shoot bends and grows in the direction of light. The statements below compare shoot cells on the lighted side with cells on the shaded side. Which statements account for the shoot growing towards the light?

May/June 2024

A student carried out an investigation into the conditions required for cress seed germination. Fig. 5.1 presents the apparatus used, the conditions applied and the results of the investigation.

May/June 2024

Which statements give correct examples of tropic responses?

May/June 2025

A seedling was positioned horizontally. Which diagram illustrates the seedling’s anticipated gravitropic responses?

May/June 2025

Can you give one example of phototropism?

May/June 2025

A young seedling is developing below ground. The shoot grows up towards the ground surface. The root grows down and away from the ground surface. Which row identifies the responses involved?

May/June 2025

A shoot tip was positioned on an agar block. Substances are able to diffuse through agar. The shoot tip was illuminated from one side only. After three days, the agar was sliced in half to make blocks X and Y. Blocks X and Y were then put on the stems of shoots whose tips had been removed. The agar pieces remained on the shoot stems for one week. Which group of shoots shows the results after one week?

May/June 2025

Seeds from different crop plants germinate at different temperatures. Table 2.1 gives the temperatures at which each crop plant germinates.

May/June 2025

Maize seeds were fixed to a board and given light from every direction. The board was set inside a clinostat, which kept the board turning. As the seeds germinated and the roots lengthened, the board continued to rotate without interruption. Fig. 6.1 shows the apparatus and the outcome after 5 days. The diagram is labelled clinostat, board, root, and a maize seed attached to the board.

May/June 2025

The diagram illustrates seedlings in two experiments investigating the tropic response of seedlings to gravity and light. In what ways have the seedlings responded?

Oct/Nov 2016

The diagram illustrates seedlings in two experiments investigating the tropic response of seedlings to gravity and light. In what ways have the seedlings responded?

Oct/Nov 2016

The diagram illustrates seedlings in two experiments on the tropic response of seedlings to gravity and light. In what way have the seedlings responded?

Oct/Nov 2016

The diagram illustrates seedlings in two experiments investigating how seedlings show a tropic response to gravity and light. In what way have the seedlings responded?

Oct/Nov 2016

The diagram illustrates seedlings in two experiments investigating the tropic response of seedlings to gravity and light. In what way have the seedlings responded?

Oct/Nov 2016

The diagram illustrates seedlings in two experiments on the tropic response of seedlings to gravity and light. How did the seedlings respond?

Oct/Nov 2016

Fig. 5.1 shows a germinating seed, with the root extending outwards.

Oct/Nov 2016

A student used two seedlings X and Y to study phototropism. The diagram illustrates the investigation. Which statement accounts for the difference in the results for X and Y?

Oct/Nov 2018

A student used two seedlings, X and Y, to investigate phototropism. The diagram illustrates the investigation. Which statement accounts for the difference in the results between X and Y?

Oct/Nov 2018

A student used two seedlings X and Y to study phototropism. The diagram illustrates the investigation. Which statement accounts for the difference in the results for X and Y?

Oct/Nov 2018

What does the term tropism mean?

Oct/Nov 2019

The diagram illustrates a seedling attached to a rotating platform. Light is shone from only one side. The platform was left to rotate for two days. It was then kept still for another two days. Which diagram shows how the seedling looks after this four-day period?

Oct/Nov 2019

The diagram illustrates the shoot and root of a seedling responding to gravity. Which row indicates where auxin builds up and the effect of this in the shoot?

Oct/Nov 2019

A gardener carried out an investigation into plant growth.

Oct/Nov 2019

A seed is positioned and left to grow on a rotating disc, as illustrated. Which diagram shows what the seedling shoot looks like after seven days?

Oct/Nov 2021

A seed is positioned and allowed to grow on a rotating disc, as shown. Which diagram illustrates how the seedling shoot appears after seven days?

Oct/Nov 2021

A seed is positioned on a rotating disc, as illustrated. Which diagram illustrates what the seedling shoot will look like after seven days?

Oct/Nov 2021

A seed is set on a disc that rotates, as illustrated. Which diagram shows what the seedling shoot looks like after seven days?

Oct/Nov 2021

A seed is positioned and allowed to grow on a rotating disc, as shown. Which diagram illustrates what the seedling shoot looks like after seven days?

Oct/Nov 2021

A seed is positioned and allowed to grow on a rotating disc, as illustrated. Which diagram indicates how the seedling shoot will look after seven days?

Oct/Nov 2021

Which row correctly describes tropic responses?

Oct/Nov 2022

Which row correctly describes tropic responses?

Oct/Nov 2022

Which of the following statements about tropisms in plants are correct?

Oct/Nov 2023

A light source is positioned on one side of a plant that is growing. What is the correct explanation of auxin’s role in shoot growth?

Oct/Nov 2023

The diagram illustrates a plant shoot growing towards light. What is the name of this shoot’s response to light?

Oct/Nov 2024

What does phototropism mean?

Oct/Nov 2024

What is one example of phototropism?

Oct/Nov 2024

A young seedling was fixed sideways to a wooden board coated with damp blotting paper. It was placed inside a dark box. After 24 hours, the diagram shows the seedling. Auxin had collected on the lower side of the shoot and the root. What can be concluded from this experiment about the effect of auxin on the seedling?

Oct/Nov 2024

The diagram illustrates a plant shoot growing towards the light. Which row identifies where auxin is produced, and which side of the shoot has the lowest concentration of auxin?

Oct/Nov 2024

Which responses are normally exhibited by the root of a plant?

Oct/Nov 2025

A plant is kept on the floor of a room beside a window with plenty of light coming through. The plant’s shoot bends and grows in the direction of the window. What might account for this reaction? 1 growth away from gravity 2 growth towards gravity 3 growth away from the light source 4 growth towards the light source

Oct/Nov 2025

The diagrams illustrate shoots of maize seedlings. Which shoot is demonstrating a gravitropic response by growing away from the stimulus?

Oct/Nov 2025

The diagram illustrates an experiment involving two wheat shoot tips, X and Y. Which statement is supported by the evidence from this experiment?

Oct/Nov 2025

Fig. 7.1 shows a plant inside a light-proof box, with the plant laid on its side in the box.

Oct/Nov 2025

State the chemical equation for photosynthesis in balanced form.

Oct/Nov 2025