Science — CBSE Class 10 board question

(a) The parts of a bisexual flower not directly involved in reproduction are the sepals (calyx) and petals (corolla). They protect the flower and attract pollinators but do not produce gametes.

(b)

| Self-Pollination | Cross-Pollination |
|---|---|
| Transfer of pollen from anther to stigma of the same flower | Transfer of pollen to the stigma of a different flower (same or different plant) |
| No pollinating agent required | Requires agents like wind, water, insects |

Significance of Pollination:

1. It enables fertilisation, leading to seed and fruit formation.
2. Cross-pollination introduces genetic variation, producing better-adapted offspring.

(c) After fertilisation:

• Each ovule develops into a seed (containing the embryo).
• The ovary wall develops into the fruit (pericarp) that encloses the seeds.

Source: Chapter 7 — How do Organisms Reproduce?

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• (a) Only 1 mark — one crisp line naming sepals and petals is sufficient.
• (b) This is the bulk of the marks (~3). A small table is neat and exam-friendly. Two significance points must be distinct. Avoid vague statements like "helps reproduction."
• (c) Examiners expect the specific fate of both ovule (→ seed) and ovary (→ fruit). Missing either halves the marks here.