Auxins and Phototropism Quiz

What do hormones in plants promote?

• Growth

• Decay

• Color change

• Fruit ripening

Where are auxins mostly made in plants?

• Apical meristems

• Stems

• Roots

• Leaves

What is phototropism?

• Growth towards nutrients

• Growth away from gravity

• Growth towards light

• Growth towards water

How do stems respond to light?

• Negative phototropism

• Positive phototropism

• No response

• Negative geotropism

What is the effect of auxins on root cells?

• Inhibits growth

• No effect

• Promotes branching

• Promotes elongation

What happens to the stem when more light reaches one side of the tips?

• Does not grow

• Grows shorter on the lighted side

• Grows evenly

• Grows longer on the shaded side

What causes a plant stem to grow towards the light?

• Excess water

• Lack of auxin

• Unequal distribution of auxin

• Equal distribution of auxin

What is the result when no light reaches the tips of a plant?

• Greater concentration of auxin on the shaded side

• Equal concentration of auxin on both sides

• Stems do not grow

• Stems grow longer

What is the role of auxins in plant growth?

• Inhibiting photosynthesis

• Promoting fruit ripening

• Causing cell reduction

• Promoting cell division

What type of tropism do roots exhibit in response to light?

• Negative phototropism

• Negative geotropism

• Positive phototropism

• Positive geotropism