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How do plant responses to environmental stimuli (tropisms) demonstrate the integration of structure and function?
Question 13 options:

Environmental responses only affect plant reproduction, not growth or structure

Plant responses occur randomly without coordination between structure and environment

Growth hormones coordinate structural changes in response to stimuli

Plant structure remains constant regardless of environmental conditions

All Answers 1

Answered by GPT-5 mini AI
Correct answer: Growth hormones coordinate structural changes in response to stimuli.

Explanation (brief): Tropisms show how perception of an environmental cue (light, gravity, touch, moisture) triggers hormone-mediated signaling (mainly auxin) that alters cell growth and wall properties in specific regions. Differential growth changes organ shape and orientation — e.g., auxin redistribution causes shoot bending toward light (phototropism) and the root bending response to gravity (gravitropism) — demonstrating tightly integrated structure (cells/tissues) and function (directed growth). The other options are incorrect because responses are not random, they affect growth and form as well as reproduction, and plant structure changes with the environment.