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Explain adaptation as the process that occurs due to natural selection, leading populations to become increasingly suited to their environments over many generations

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Cambridge IGCSE BiologyVariation and selectionSupplement content

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Explain adaptation as the process that occurs due to natural selection, leading populations to become increasingly suited to their environments over many generations

  • This point belongs to Selection, especially Selection outcomes.
  • You need to be able to explain adaptation as the process that occurs due to natural selection, leading populations to become increasingly suited to their environments over many generations.
  • The key ideas to know are Describe.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

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Describe

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Paper 4 structured question: Selection

Paper 4Theory (Extended)3 marks

Description

Adaptation Process

A population of beetles lives in a forest. Some beetles have green shells, and some have brown shells. Birds can see the green beetles more easily and eat them, but the brown beetles are better camouflaged and survive more often. Over many generations, the number of brown beetles increases in the population.

  1. a

    Describe how natural selection leads to adaptation in this beetle population.

    Aim for approximately 3 distinct marking points.

    [3]
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