Tropisms

Front

What is tropism?

Back

A plant's response to a stimulus.

Front

What is positive phototropism?

Back

The growth of a plant toward a light source.

Front

What is negative phototropism?

Back

The growth of a plant away from a light source.

Front

What is gravitropism (or geotropism)?

Back

The movement of a plant in response to gravity.

Front

What is thigmotropism?

Back

The movement of plants in response to touch.

Front

What are external stimuli?

Back

Changes outside the plant.

Front

What are internal stimuli?

Back

Changes inside the plant.

Front

What is the role of auxins in phototropism?

Back

Auxins are hormones that promote plant growth toward light.

Front

What is hydrotropism?

Back

The growth of a plant in response to moisture.

Front

What is the difference between positive and negative geotropism?

Back

Positive geotropism is growth toward gravity (roots), while negative geotropism is growth away from gravity (stems).