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Draw a neat diagram to show… (Class 10 Science 2026, Q12)

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ScienceCBSE Class 10 · Board exam 2026, set 31/1/1 · 2 marks · Diagram

CBSE Class 10 Science 2026: question 12

Set in the CBSE Class 10 board exam of 2026, paper 31/1/1, section A, question 12, for 2 marks. Try it first; the hints and our step-by-step solution are below.

Q12 · 2 marks · DiagramHow do Organisms Reproduce?

Draw a neat diagram to show germination of pollen on the female reproductive part of the flower. Name and label only the following parts:

  1. (a)

    The part that receives the pollen grain.

    0 marks
  2. (b)

    The structure that carries the male germ cell to reach the female germ cell.

    0 marks

Figure in the paper: Student to draw a neat labelled diagram of pollen germination on the stigma of a flower, with a pollen tube growing down through the style towards the ovary. See it in the official paper.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2026 board paper, set 31/1/1.

Hints

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

Hint 1

Start with the pistil: stigma, style and ovary.

Hint 2

The pollen grain grows a tube down the style towards the ovule.

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. Diagram: draw a pistil with the stigma at the top, a long style and a swollen ovary at the base containing an ovule. Show a pollen grain on the stigma with a pollen tube growing out of it, down through the style, entering the ovule.

    1 mark

  2. (a) Label the top sticky surface of the pistil Stigma. It receives the pollen grain.

    ½ mark

  3. (b) Label the tube running from the pollen grain through the style Pollen tube. It carries the male germ cell to the female germ cell in the ovule.

    ½ mark

Answer: Neat diagram of pollen germinating on the stigma; labels (a) Stigma, (b) Pollen tube.

Where the marks are

  • Correct diagram of germination of pollen on stigma (1 mark)
  • Label (a) Stigma (½ mark)
  • Label (b) Pollen tube (½ mark)

Revise the chapter

Practise this chapterBoard-style questions from How do Organisms Reproduce?, one at a time, marked against the answer key and marking points.Back to the full paper2026 board paper, set 31/1/1: 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.