Science Form 3_Chap 1.3 Stimuli and Responses in Plants

Front

What is stimuli?

Back

Changes in an organism’s environment that cause a response.

Front

What is geotropism?

Back

The growth of a plant's roots downward in response to gravity.

Front

What do plants do when they receive light from one direction?

Back

They grow toward the light source.

Front

What is tropism?

Back

A directional response of plants to stimuli.

Front

What are examples of stimuli for plants?

Back

Touch, Light, Gravity, Water, all of the above.

Front

What is phototropism?

Back

The growth of a plant in response to light.

Front

What is thigmotropism?

Back

The growth of a plant in response to touch.

Front

What is hydrotropism?

Back

The growth of plant roots toward moisture.

Front

What is the role of auxins in plant responses?

Back

Auxins are hormones that regulate plant growth and responses to stimuli.

Front

How do plants respond to gravity?

Back

Roots grow downward (positive geotropism) and shoots grow upward (negative geotropism).