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Cambridge IGCSE Biology practice

Paper 4 structured question: Sexual reproduction in plants

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Attempt questionSexual reproduction in plants revisionRevise the key idea

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Sexual reproduction in plants

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Paper 4Theory (Extended)2 marks

A population of flowering plants can reproduce by self-pollination or cross-pollination.

Description

Pollination Types

Self-pollination involves pollen fertilizing the same flower or another flower on the same plant. Cross-pollination involves pollen transfer between different plants, often requiring pollinators.

  1. a

    State one effect of self-pollination on genetic variation in a plant population.

    Aim for approximately 1 distinct marking point.

    [1]
  2. b

    Identify one advantage of cross-pollination compared to self-pollination.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 4 structured question: Sexual reproduction in plants

Paper 4Theory (Extended)2 marks

Description

Pollination and Plant Populations

Self-pollination does not require pollinators, while cross-pollination depends on pollinators such as insects or wind.

  1. a

    State one way self-pollination affects a plant population's dependence on pollinators.

    Aim for approximately 1 distinct marking point.

    [1]
  2. b

    Identify one reason why cross-pollination can improve adaptability in a plant population.

    Aim for approximately 1 distinct marking point.

    [1]