객관식
Which part of a plant is most likely to grow toward a light source due to phototropism?
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37. Plant Sensation and Response
Phototropism
객관식
The face of a sunflower turns to follow the sun as it moves across the sky. This is an example of:
A
thigmotropism
B
gravitropism
C
phototropism
D
hydrotropism
검증된 단계별 안내1
Step 1: Begin by understanding the concept of tropism, which refers to the directional growth or movement of an organism in response to an external stimulus.
Step 2: Review the specific types of tropisms mentioned in the problem: thigmotropism (response to touch), gravitropism (response to gravity), phototropism (response to light), and hydrotropism (response to water).
Step 3: Focus on the behavior described in the problem: the sunflower's face turning to follow the sun as it moves across the sky. This indicates a response to light, which is the defining characteristic of phototropism.
Step 4: Compare the behavior to the definitions of the other tropisms to confirm that they do not match the described response. For example, thigmotropism involves touch, gravitropism involves gravity, and hydrotropism involves water, none of which apply here.
Step 5: Conclude that the correct answer is phototropism, as it specifically refers to the movement or growth of an organism in response to light.
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