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Arrange the following in the… (Class 12 Biology 2026, Q6)

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BiologyCBSE Class 12 · Board exam 2026, set 57/5/1 · 1 mark · MCQ

CBSE Class 12 Biology 2026: question 6

Set in the CBSE Class 12 board exam of 2026, paper 57/5/1, section A, question 6, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q6 · 1 mark · MCQEvolution

Arrange the following in the correct sequence of their evolution and select the correct option :

(i) Seaweed
(ii) Invertebrates
(iii) Jawless fish

  1. (A)(i), (ii), (iii)
  2. (B)(i), (iii), (ii)
  3. (C)(ii), (iii), (i)
  4. (D)(ii), (i), (iii)

Source: official question paper from cbse.gov.in (PDF). See it in the full 2026 board paper, set 57/5/1.

Hints

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

Hint 1

Recall the NCERT geological timeline of evolution in mya.

Hint 2

Invertebrates came about 500 mya. Compare when jawless fish and seaweeds appeared.

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. Invertebrates were formed and active about 500 million years ago, and jawless fish arose around 350 million years ago.

    ½ mark

  2. Seaweeds and a few plants existed around 320 million years ago. The order is therefore (ii), (iii), (i), option (C).

    ½ mark

Answer: (C) (ii), (iii), (i)

Where the marks are

  • Chooses (C) (1 mark)

Revise the chapter

  • Chapter: Evolution (notes, formulas, where marks are lost and every past question)
Practise this chapterBoard-style questions from Evolution, one at a time, marked against the answer key and marking points.Back to the full paper2026 board paper, set 57/5/1: 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.