Topic 5 - Plant Hormones

Question 1

What is phototropism?

Answer 1

The growth of a plant in response to light.

Question 2

Explain how gravitropism/geotropism affects roots. Refer to plant hormones. (3 marks)

Answer 2

Gravity has produced an unequal distribution of auxin in the tip of the shoot with more auxin on the lower side.
Auxin would inhibit growth on the lower side of the root.
This would cause the root to grow downwards.