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In a controlled… (Class 10 Science SQP 2026-27, Q4)

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ScienceCBSE Class 10 · Sample paper, session 2026-27 · 1 mark · MCQ

CBSE Class 10 Science sample paper 2026-27: question 4

From the official CBSE sample question paper for 2026-27, section A, question 4, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q4 · 1 mark · MCQCompetency-basedHow do Organisms Reproduce?

In a controlled experiment, the anthers of a mustard plant's flowers were carefully removed in the bud stage before they matured. The bud was covered with a paper bag. What will be the most likely result for these flowers?

  1. (A)They will still produce seeds and fruit through self-pollination.
  2. (B)They will attract more insects and produce larger flowers but no fruit.
  3. (C)They will not produce any seeds or fruits.
  4. (D)They will produce seeds and fruits that are genetically identical to the parent.

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

What do anthers produce?

Hint 2

With anthers removed and the flower bagged, can any pollen reach the stigma?

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. Removing the anthers in the bud stage removes the flower's own pollen, so self-pollination cannot happen.

  2. Covering the bud with a paper bag stops pollen from other flowers reaching the stigma, so cross-pollination cannot happen either.

  3. Without pollination there is no fertilisation. Without fertilisation, ovules do not become seeds and the ovary does not become a fruit. The correct option is (C).

    1 mark

Answer: Option (C): They will not produce any seeds or fruits.

Where the marks are

  • Selects (C), reasoning that no pollination leads to no fertilisation and so no seeds or fruits (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 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.