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Question

How do plants convey information about a touch from one cell to another?

This question was previously asked in
SSC CHSL 2025 Tier 1 Question Paper (21-Nov-2025) (Shift 1)
The correct answer is

By using electrical-chemical signals

The question asks how plants pass information about touch from one cell to the next.

The correct answer is by using electrical-chemical signals.

Although plants have no nervous system, they respond to stimuli through changes in ion concentrations (such as calcium) that generate electrical signals across cell membranes.

These electrical impulses, along with chemical messengers, travel between cells and trigger responses like the rapid folding of Mimosa pudica (touch-me-not) leaves.

Plants do not possess specialised nerve tissue, so option 1 is wrong.

They also do not communicate touch by producing sound waves or by changing the colour of their leaves, so those options are incorrect.

Hence plants convey information about a touch By using electrical-chemical signals.

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