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6.3 Plant hormones

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Question 23
F

Three groups of shoots receive light from the left. The table shows their mean bending after one day.

Table

TreatmentMean angle towards light
No cap24∘24^\circ24∘
Transparent cap over tip23∘23^\circ23∘
Opaque cap over tip1∘1^\circ1∘

Why is the transparent-cap group needed?

[1]
A

to test whether removing the tip prevents the movement of plant hormones

B

to test whether a cap affects bending when light still reaches the tip

C

to test whether gravity affects bending when light cannot reach the tip

D

to test whether removing light increases the rate of growth at the tip

Markscheme

6.3 Plant hormones Questions

  1. GCSE
  2. /Biology
  3. /6.3 Plant hormones

46 exam-style questions on Edexcel GCSE Biology 6.3 Plant hormones, covering 6.3.1 Plant hormones and tropisms and 6.3.2 Commercial uses of plant hormones. Each one has a worked solution and a mark scheme showing where the marks go.

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