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B. How is the… (Class 10 Science SQP 2026-27, Q11B)

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ScienceCBSE Class 10 · Sample paper, session 2026-27 · 2 marks · Very short answer

CBSE Class 10 Science sample paper 2026-27: question 11(B)

From the official CBSE sample question paper for 2026-27, section A, question 11(B), for 2 marks. Try it first; the hints and our step-by-step solution are below.

Q11(B) · 2 marks · Very short answerControl and Coordination

B. How is the information of touch in the 'sensitive plant' controlled and coordinated?

Source: official sample paper from cbseacademic.nic.in (PDF). See it in the full Sample paper 2026-27.

Hints

Open one hint at a time and try again before the next.

Hint 1

Plants have no nerves, so how might a signal pass from cell to cell?

Hint 2

Without muscles, how can a plant cell change its shape?

Step-by-step solution

Each step shows the marks it earns, as an examiner would award them. Checked by an independent re-solve from the question paper.

  1. Plants have no nervous tissue. When the sensitive plant (touch-me-not) is touched, the information is passed from cell to cell by electrical-chemical means.

    1 mark

  2. Plant cells respond by changing the amount of water in them. They swell or shrink, which changes their shape, and this makes the leaves fold and droop.

    1 mark

Answer: Touch is communicated from cell to cell by electrical-chemical signals; cells change shape by gaining or losing water (swelling or shrinking), so the leaves fold.

Where the marks are

  • States electrical-chemical communication from cell to cell (1 mark)
  • Explains movement by change in water content and shape of cells (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Control and Coordination, one at a time, marked against the answer key and marking points.Back to the full paperSample paper 2026-27: every question, by section.

The question is transcribed from the official paper; figures are described in words. The solution, hints and chapter tag are ours. Spotted an error? Write tosupport@questionbuddy.in.