CAIE IGCSE Biology 16.3.11 Effects of Self- & Cross-pollination

Practise evaluating self- and cross-pollination through variation, environmental response and reliance on pollinating agents.

Exam points

link self-pollination to reliable transfer with less pollen waste and less reliance on pollinators
link cross-pollination to greater variation and capacity to survive environmental change
balance cross-pollination benefits against extra pollen, energy and dependence on wind or animals

[Maximum number: 3]

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

Fig. 3.3

Explain the disadvantages of cross-pollination compared with self-pollination.

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