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(i) In an angiospermic… (Class 10 Science 2026, Q16A)

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ScienceCBSE Class 10 · Board exam 2026, set 31/5/1 · 5 marks · Long answer

CBSE Class 10 Science 2026: question 16(A)

Set in the CBSE Class 10 board exam of 2026, paper 31/5/1, section A, question 16(A), for 5 marks. Try it first; the hints and our step-by-step solution are below.

Q16(A) · 5 marks · Long answerHow do Organisms Reproduce?

(i) In an angiospermic flower, fertilization is said to take place when male gametes carried in the pollen tube fuse with the female gamete, present in the embryo sac. This results in lot of changes in different parts of the flower. State the changes taking place in the following structures of flower post fertilization :
(a) Zygote
(b) Ovule
(c) Ovary
(d) Sepals

  1. (i)

    State the changes taking place in the following structures of flower post fertilization: (a) Zygote (b) Ovule (c) Ovary (d) Sepals

    4 marks
  2. (ii)

    Define germination.

    1 mark

Source: official question paper from cbse.gov.in (PDF). See it in the full 2026 board paper, set 31/5/1.

Hints

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

Hint 1

Think of what you find inside a fruit and inside a seed.

Hint 2

Match: zygote–embryo, ovule–?, ovary–?; then recall what happens to the outer floral parts.

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. (i)(a) Zygote: divides repeatedly to form the embryo inside the ovule.

    1 mark

  2. (b) Ovule: develops a tough coat and gradually becomes the seed.

    1 mark

  3. (c) Ovary: grows rapidly and ripens to form the fruit.

    1 mark

  4. (d) Sepals: shrivel and fall off (along with petals and stamens).

    1 mark

  5. (ii) Germination is the process by which the embryo in a mature seed grows into a seedling under suitable conditions of water, air and temperature.

    1 mark

Answer: Zygote → embryo; ovule → seed; ovary → fruit; sepals shrivel and fall; germination = seed developing into a seedling under suitable conditions.

Where the marks are

  • Zygote forms embryo (1 mark)
  • Ovule forms seed (1 mark)
  • Ovary forms fruit (1 mark)
  • Sepals shrivel and fall off (1 mark)
  • Correct definition of germination (1 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 31/5/1: 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.