1.3 : STIMULI AND RESPONSES IN PLANTS

Tropism is a directional response of plants to ________________.

What is stimuli?

• changes in an organism’s environment that cause a response.

• plant’s response to the number of hours of darkness in its environment.

• substances that act as chemical messengers within plants.

• growth toward a stimulus.

What is an example of a stimulus for plants?

• Touch

• Light

• Gravity

• Water

• all of the above

Tags

NGSS.MS-LS1-5

NGSS.MS-LS1-6

NGSS.MS-LS2-1

what type of tropism is occurring here?

• Phototropism

• Thigmotropism

• Gravitropism

• Hydrotropism

What type of tropism is occurring here?

What type of tropism is occurring here?

Mimosa sp. responds to touch by folding its leaves inwards when touched. The responds occurs rapidly.

• Thigmotropism

• Phototropism

• Geotropism

• Nastic movement

Changes in an organism's environment that cause a response

• Tropism

• Stimuli

• Hormone

• Response

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

When the plant grows toward the light.

• Negative hydrotropism

• Positive geotropism

• Negative phototropism

• Positive phototropism

What type of tropism response to water?