Question

some plants close their leaves for protection when they are touched. this is an example of which tropism?
○ hydrotropism
○ phototropism
○ gravitropism
○ thigmotropism
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Explanation:

• Hydrotropism is the growth of plants in response to water.
• Phototropism is the growth of plants in response to light.
• Gravitropism is the growth of plants in response to gravity.
• Thigmotropism is the growth of plants in response to touch. Since the plants close their leaves when touched, this is a response to touch.

Answer:

thigmotropism