Tropism in Plants

What is tropism in plants?

• A plant's ability to move from one place to another.

• A plant's growth response towards or away from a stimulus.

• The process by which plants produce hormones.

• The way plants absorb sunlight for photosynthesis.

Which type of tropism describes a plant's growth response to touch, such as vines coiling around an object?

• Phototropism

• Gravitropism

• Thigmotropism

• Hydrotropism

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What is the term for a plant's growth response towards light?

• Gravitropism

• Thigmotropism

• Phototropism

• Chemotropism

Which type of tropism causes plant roots to grow downwards?

• Phototropism

• Gravitropism

• Thigmotropism

• Hydrotropism

How does auxin influence a plant's response to light?

• It causes the plant to grow away from light.

• It speeds up the rate of cell growth on the shaded side of the stem, causing the stem to bend towards the light.

• It makes the plant's roots grow deeper into the soil.

• It helps the plant to coil around objects for support.