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Assertion: Probability… (Class 10 Science SQP 2023-24, Q18)

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ScienceCBSE Class 10 · Sample paper, session 2023-24 · 1 mark · Assertion-reason

CBSE Class 10 Science sample paper 2023-24: question 18

From the official CBSE sample question paper for 2023-24, section A, question 18, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q18 · 1 mark · Assertion-reasonCompetency-basedHow do Organisms Reproduce?

Assertion: Probability of survival of an organism produced through sexual reproduction is more than that of organism produced through asexual mode.
Reason: Variations provide advantages to individuals for survival.

  1. (A)Both A and R are true, and R is the correct explanation of A.
  2. (B)Both A and R are true, and R is not the correct explanation of A.
  3. (C)A is true but R is false.
  4. (D)A is false but R is true.

Source: official sample paper from cbseacademic.nic.in (PDF). See it in the full Sample paper 2023-24.

Hints

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

Hint 1

Which mode of reproduction creates more variation?

Hint 2

Does variation explain better survival?

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. Sexual reproduction produces variations, so the offspring have a better chance of surviving in a changing environment. The Assertion is true.

  2. Variations help some individuals survive, which is exactly why survival is higher. Both are true and R explains A, so the answer is option (A).

    1 mark

Answer: Option (A)

Where the marks are

  • Both true and R correctly explains A (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 2023-24: 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.