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CAIE IGCSE Biology 16.3.6 Fertilisation in Flowering Plants

Practise tracing pollen-tube growth to the ovule and identifying fertilisation as fusion of male and female nuclei.

Syllabus
2026–2028
Course
Biology 0610

Exam points

  • sequence pollen germination and pollen-tube growth through the style into an ovule
  • locate fertilisation within the ovary or ovule on a labelled flower diagram
  • state that fertilisation is fusion of a pollen nucleus with a nucleus in the ovule

16.3.6—Fertilisation occurs when a pollen question 1

[Maximum number: 2]

Question (a)

(a)

Fig. 3.2 shows the life cycle of a fern. The life cycle of a fern has some similarities and some differences compared with the life cycles of other plants.

The letters represent processes that occur during the life cycle.
The haploid stages of the life cycle are represented by (n).
The diploid stages of the life cycle are represented by (2 n).

Fig. 3.2

Fig. 3.2

[ 1 ]

Question (i)

(i)

State the name of process D in Fig. 3.2.

[ 1 ]

Question (b)

(b)

Fig. 3.3 shows the parts of two flowers from two different plants of the same species.

Fig. 3.3

Fig. 3.3

[ 1 ]

Question (i)

(i)

Draw an X on Fig. 3.3 to show where fertilisation occurs.

[ 1 ]
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