Tropism Do Now

What is the response of a plant to light called?

• Phototropism

• Geotropism

• Photosynthesis

• Hydrotropism

Which type of tropism is responsible for the growth of plant roots downward?

• Negative gravitropism

• Positive gravitropism

• Hydrotropism

• Phototropism

What is the term for the response of a plant to touch or contact?

• gravitropism

• thigmotropism

• chemotropism

• photosynthesis

What is the name for the growth of a plant in response to water?

• phototropism

• geotropism

• hydrotropism

• thermotropism

What plant hormone is responsible for phototropism?

• Cytokinin

• Ethylene

• Gibberellin

• Auxin

How does geotropism affect the growth of plant roots?

• It causes the roots to grow downward

• It causes the roots to stop growing

• It causes the roots to grow upward

• It causes the roots to grow sideways

Give an example of a thigmotropic plant.

• Rose

• Cactus

• Mimosa pudica

• Sunflower

How does hydrotropism help plants survive?

• It has no impact on plant survival.

• It helps plants grow away from sources of water.

• It helps plants grow towards sources of water.

• It helps plants grow towards sources of sunlight.

What are the two main types of phototropism?

• Fast and slow phototropism

• Positive and negative phototropism

• Up and down phototropism

• Left and right phototropism

Explain how plants use thigmotropism to support their growth.

• Plants respond to temperature by growing in a particular direction.

• Plants respond to light by growing in a particular direction.

• Plants respond to sound by growing in a particular direction.

• Plants respond to touch or mechanical stimulation by growing in a particular direction.