If the tip of a plant is cut off, why may phototropism become weak?
Answer and explanation
Correct answer: Because auxin is produced at the tip
Phototropism is the directional growth of a plant shoot in response to light. The shoot tip produces auxin, a plant hormone that promotes cell elongation. When light comes from one side, auxin distribution helps the shaded side elongate more, causing the shoot to bend toward light. Cutting off the tip removes an important source of auxin, so this unequal growth and bending may become weak. Blood, spinal cord, and insulin are unrelated to plant phototropism.
Frequently asked questions
What is the correct answer to this question?
Because auxin is produced at the tip
Why is this the correct answer?
Phototropism is the directional growth of a plant shoot in response to light. The shoot tip produces auxin, a plant hormone that promotes cell elongation. When light comes from one side, auxin distribution helps the shaded side elongate more, causing the shoot to bend toward light. Cutting off the tip removes an important source of auxin, so this unequal growth and bending may become weak. Blood, spinal cord, and insulin are unrelated to plant phototropism.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Control and Coordination.
