Tropisms

Plant responses are controlled by growth.

• true

• false

A plant's growth in response to a stimulus is called a -

• situation

• experiment

• tropism

Responses to light are called:

• geotropism 

• phototropism

• hydrotropism

Responses to gravity are called:

• geotropism

• hydrotropism

• phototropism

Responses to water are called:

• thigmotropism

• phototropism

• hydrotropism

Plant roots always grown down into the soil and toward water.

• true

• false

Light falls unevenly on plants.

• false

• true

A plant that grows toward the light is called negative phototropism.

• true

• false

How does tropism help plants?

• helps them change color

• helps them survive

• helps them grow

• enables them to smell nice.