Tropism

What causes plants to bend toward the sunlight?

• positive thigmotropism

• positive thigmotropism

• negative phototropism

• positive phototropism

When a seed germinates, why do roots grow downward toward the ground?

• positive thigmotropism

• negative hydrotropism

• positive geotropism

• negative phototropism

Tags

NGSS.MS-LS1-5

Which letter on the diagram represents the external stimulus?

• W

• X

• Y

• Z

Roots of a tree growing towards the water line of a house.

• Geotropism

• Phototropism

• Thigmotropism

• Hydrotropism

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Venus Flytrap flower reacts to a bug.

• Thermotropism

• Negative Geotropism

• Thigmotropism

• Hydrotropism

The shoot of a plant growing up.

• Positive geotropism

• Negative geotropism

• Thigmotropism

• Hydrotropism

Tags

NGSS.MS-LS1-5

A tropism is...

• a change in the environment

• plant movement in response to a stimulus

• something that causes a response

• when photosynthesis takes place

The root of a plant growing down.

• Positive geotropism

• Negative geotropism

• Thigmotropism

• Hydrotropism

A plant growing in response to a greenhouse light.

• Geotropism

• Phototropism

• Thigmotropism

• Hydrotropism

Tags

NGSS.MS-LS1-5

NGSS.MS-LS1-6

Sunflowers turning towards the sun.

• Hydrotropism

• Phototropism

• Thigmotropism

• Geotropism

Tags

NGSS.MS-LS1-6