Chapter 6 - Plant Growth

Question 1

Define tropism?

Answer 1

Any response to a stimulus

Question 2

Examples of tropism?

Answer 2

1. Positive: towards stimulus
2. Negative: away from stimulus
3. Geotropism: response to gravity
4. Phototropism: response to light
5. Hydrotropism: response to water

Question 3

What is an auxin?

Answer 3

A plant growth hormone produced in the shoot tip

Question 4

What does an auxin do?

Answer 4

1. Encourages growth
2. Levels changed by outdoor conditions
3. Stimulates shoots
4. Retards roots
5. Make cells bigger