Which major hormone promotes growth in plants?
Answer and explanation
Correct answer: Auxin
The governing concept is plant hormonal coordination. Auxin is a plant hormone that promotes cell elongation, especially in young shoots, and it also helps produce directional growth such as phototropism. Therefore, option A, Auxin, is correct. Insulin regulates blood glucose in animals, adrenaline supports emergency responses, and thyroxine regulates metabolism, so these distractors are not the major plant-growth hormone.
Frequently asked questions
What is the correct answer to this question?
Auxin
Why is this the correct answer?
The governing concept is plant hormonal coordination. Auxin is a plant hormone that promotes cell elongation, especially in young shoots, and it also helps produce directional growth such as phototropism. Therefore, option A, Auxin, is correct. Insulin regulates blood glucose in animals, adrenaline supports emergency responses, and thyroxine regulates metabolism, so these distractors are not the major plant-growth hormone.
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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