Multiple Choice
Which part of a plant is most likely to exhibit negative phototropism?
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37. Plant Sensation and Response
Phototropism
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Solar tracking, or _____, is a plant's growth toward light.
A
thigmotropism
B
phototropism
C
gravitropism
D
hydrotropism
Verified step by step guidance1
Understand the concept of tropisms: Tropisms are directional growth responses in plants to environmental stimuli. Each type of tropism is named based on the stimulus involved.
Define the key terms: Phototropism refers to a plant's growth toward or away from light. Thigmotropism is a response to touch, gravitropism is a response to gravity, and hydrotropism is a response to water.
Analyze the problem: The question asks about a plant's growth toward light, which directly relates to the definition of phototropism.
Eliminate incorrect options: Thigmotropism, gravitropism, and hydrotropism do not involve light as the stimulus, so they can be ruled out.
Conclude the correct answer: Based on the definitions and the context of the question, the correct answer is phototropism.
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