Which statement correctly explains directional growth of root and stem together?
Answer and explanation
Correct answer: Stem usually grows towards light and root usually grows in the direction of gravity
The governing concept is tropism, in which plant organs show directional growth in response to stimuli. Shoots commonly show positive phototropism by growing toward light, while roots commonly show positive geotropism by growing in the direction of gravity. Thus option A correctly combines the two responses. The other choices use absolute or impossible claims and incorrectly mention a spinal cord.
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What is the correct answer to this question?
Stem usually grows towards light and root usually grows in the direction of gravity
Why is this the correct answer?
The governing concept is tropism, in which plant organs show directional growth in response to stimuli. Shoots commonly show positive phototropism by growing toward light, while roots commonly show positive geotropism by growing in the direction of gravity. Thus option A correctly combines the two responses. The other choices use absolute or impossible claims and incorrectly mention a spinal cord.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Control and Coordination.
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