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CAIE IGCSE Biology 18.2.1 Defining an Adaptive Feature

Practise defining an adaptive feature as inherited and explaining how it helps survival and reproduction in an environment.

Syllabus
2026–2028
Course
Biology 0610

Exam points

  • state that an adaptive feature is inherited rather than acquired during an organism's life
  • link the feature to both survival and reproduction in the organism's environment

18.2.1—Adaptive feature as an inherited question 1

[Maximum number: 3]

The Hawaiian happy-face spider, Theridion grallator, is found on several of the Hawaiian islands. Some of the spiders have a very distinctive pattern on their bodies as shown in Fig. 1.3.

Fig. 1.3

Fig. 1.3

Scientists think that the pattern on the bodies of the spiders is an adaptive feature. Explain the term adaptive feature with reference to this pattern.

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