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6.3 Plant hormones

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Question 28

A young pea shoot grows vertically inside a lightproof chamber. A narrow beam of light enters through a slit in the southern wall of the chamber and reaches the shoot tip. The north and south sides of the growing region are labelled N and S.

Which combination is expected after the shoot begins responding?

[1]
A

more auxin on side N, with the shoot curving towards the southern wall

B

more auxin on side N, with the shoot curving towards the northern wall

C

more auxin on side S, with the shoot curving towards the southern wall

D

more auxin on side S, with the shoot curving towards the northern wall

Markscheme

6.3 Plant hormones Questions

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

105 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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