Why is folding of Mimosa leaves on touch not a growth-based movement?
Answer and explanation
Correct answer: It occurs quickly because of a change in cell-water content
Growth movements result from permanent changes in cell size or number and generally occur slowly. Mimosa leaves fold within a short time after touch because water moves out of or between specialized motor cells, changing their turgor pressure. This is a rapid nastic response rather than growth. No new cells, stem elongation, or seed formation is required, so option A is correct.
Frequently asked questions
What is the correct answer to this question?
It occurs quickly because of a change in cell-water content
Why is this the correct answer?
Growth movements result from permanent changes in cell size or number and generally occur slowly. Mimosa leaves fold within a short time after touch because water moves out of or between specialized motor cells, changing their turgor pressure. This is a rapid nastic response rather than growth. No new cells, stem elongation, or seed formation is required, so option A is correct.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Control and Coordination.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
