Plant Responses

What do plants rely on to respond to their environment?

• Electrical signals

• Nervous system

• Hormones

• Muscles

What is the role of auxins in plant shoots?

• Stimulate growth

• Cause wilting

• Inhibit growth

• No effect

What is phototropism?

• Response to gravity

• Response to light

• Response to touch

• Response to water

Where do auxins accumulate in a plant shoot exposed to light?

• Sunny side

• Shaded side

• Lower side

• Upper side

How do auxins affect root growth?

• No effect

• Inhibit growth

• Cause wilting

• Stimulate growth

What is geotropism also known as?

• Gravitropism

• Hydrotropism

• Phototropism

• Thigmotropism

How do roots respond to light?

• Positively geotropic

• Negatively phototropic

• Negatively geotropic

• Positively phototropic

What happens to a plant shoot when auxins accumulate on the shaded side?

• It grows straight

• It curves towards the light

• It stops growing

• It wilts

What is the effect of auxins on the lower side of a horizontally positioned root?

• Cause wilting

• No effect

• Inhibit growth

• Stimulate growth

What is the primary function of auxins in plants?

• Water absorption

• Nutrient transport

• Control growth

• Photosynthesis