What is the most likely effect of applying gibberellin to a dwarf plant?
Answer and explanation
Correct answer: Stem length may increase
Gibberellin is a plant growth hormone that promotes stem elongation and can increase the length of dwarf plants in suitable conditions. Applying it may therefore make the stem taller, so option A is correct. The remaining options describe effects on animal physiology: blood-sugar regulation, heartbeat and spinal-cord activity are not functions of gibberellin. The word “may” is appropriate because the response depends on the plant and dose.
Frequently asked questions
What is the correct answer to this question?
Stem length may increase
Why is this the correct answer?
Gibberellin is a plant growth hormone that promotes stem elongation and can increase the length of dwarf plants in suitable conditions. Applying it may therefore make the stem taller, so option A is correct. The remaining options describe effects on animal physiology: blood-sugar regulation, heartbeat and spinal-cord activity are not functions of gibberellin. The word “may” is appropriate because the response depends on the plant and dose.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Control and Coordination. Topic: Plant hormones.
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