Home / iGCSE Biology (0610)-16.3 Sexual reproduction in plants – iGCSE Style Questions Paper 3

iGCSE Biology (0610)-16.3 Sexual reproduction in plants – iGCSE Style Questions Paper 3

IGCSE Biology (0610) Practice Questions Paper 3 - All Chapters
Question

(a) Fig. 5.1 is a diagram of an insect‑pollinated flower.

Insect-pollinated flower diagram

(i) State the letters of the structures in Fig. 5.1 that make up the stamen.
…………………………………………………….. and ……………………………………………………..
(ii) State the letter of the structure in Fig. 5.1 where fertilisation takes place.
(iii) Explain how the part labelled G in Fig. 5.1 is adapted for its function.

(b) (i) Complete the sentence about pollination.
Pollination is the transfer of pollen grains from the ………………………………………. to the ………………………………………. .
(ii) State three ways that pollen grains from insect‑pollinated flowers differ from pollen grains from wind‑pollinated flowers.

▶️ Answer/Explanation
Solution

(a) (i) A and B

Explanation: The stamen consists of the anther (A) and the filament (B). The anther produces pollen, while the filament supports it.

(a) (ii) D

Explanation: Fertilisation occurs in the ovule (D), where the male gamete fuses with the female gamete to form a zygote.

(a) (iii) Bright colours/large/landing platform/guidelines/scented to attract pollinators.

Explanation: The petal (G) is adapted to attract pollinators through visual cues (bright colours), scent, and physical structures like a landing platform.

(b) (i) anther to stigma.

Explanation: Pollination involves the transfer of pollen from the anther (male part) to the stigma (female part) of a flower.

(b) (ii) Larger, heavier, sticky/hooked, produced in smaller quantities.

Explanation: Insect-pollinated pollen grains are adapted for animal transport—they are larger, stickier, and produced in smaller quantities compared to wind-pollinated pollen.

Question

A student carefully took a fuchsia flower apart. Fig. 8.1 is a photograph of the parts of the flower.

Fuchsia Flower Parts

State the function of each of the parts labelled A to D in Fig. 8.1.

▶️ Answer/Explanation
Solution

Ans:

A: Attracts insects or pollinators, aiding in the transfer of pollen for fertilization.

B: Contains the female sex cells (ovules), which develop into seeds after fertilization.

C: Produces and releases male gametes (pollen), essential for fertilizing the ovules.

D: Receives pollen grains during pollination, facilitating fertilization.

These structures work together to ensure successful sexual reproduction in flowering plants.

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