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Following is a… (Class 12 Biology SQP 2026-27, Q21B)

questionbuddy.in/q/cbse-12-biology-2026-27-sqp-q21b-hypothetical-data-plant-pollinator-interaction

BiologyCBSE Class 12 · Sample paper, session 2026-27 · 2 marks · Very short answer

CBSE Class 12 Biology sample paper 2026-27: question 21(B)

From the official CBSE sample question paper for 2026-27, section B, question 21(B), for 2 marks. Try it first; the hints and our step-by-step solution are below.

Q21(B) · 2 marks · Very short answerCompetency-basedOrganisms and Populations

Following is a hypothetical data on Plant Pollinator interaction

PlantMain PollinatorSeed set (%) with pollinatorSeed set (%) without pollinator
P1H1 (Bee)8040
P2H2 (Butterfly)7545
P3H3 (Moth)8535

I. From the data above, justify which plant shows the highest dependence on its main pollinator?
II. What kind of ecological interaction is shown in the table above? Define it in one sentence.

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

Subtract the seed set without the pollinator from the seed set with it, for each plant.

Hint 2

What does each partner gain in plant–pollinator relationships?

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. P3 shows the highest dependence on its pollinator. Its seed set falls from 85% to 35%, a drop of 50 percentage points. The drops for P1 (40 points) and P2 (30 points) are smaller.

    1 mark

  2. II. The interaction is mutualism: an interaction in which both species benefit. Here the plant gets pollinated, and the pollinator obtains nectar or food.

    1 mark

Answer: I. P3 (seed set drops by 50 percentage points). II. Mutualism: both species benefit.

Where the marks are

  • P3, justified by the largest drop in seed set (1 mark)
  • Mutualism, with a correct one-line definition (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Organisms and Populations, 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.