GK
GENERAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following observation(s) tell(s) us that plant can respond to changes in the environment?A-Mimosa plants close their leaves when touched.B-Roses are beautiful and can attract insects to them.C-Plants in a dark box grow towards the hole where there is light.
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A only
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B only
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A and C only
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B and C only
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Explanation:
Detailed explanation-1: -Answer. The mimosa plant responds to stimuli like touch and heat by rapidly folding up its leaflets and drooping. It also exhibits the same reaction in response to light/dark cycles, folding up and drooping at night and reopening in the daytime. The leaves of mimosa plants have joint-like structures called pulvini.
Detailed explanation-2: -The movements are attributed to the amount of auxin, K+ ions and therefore the movement of water. Entry of water to the lower side of the pulvinus causes the leaves to stand erect and the exit of water causes them to droop.
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