Home / iGCSE Biology (0610)-18.3 Selection – iGCSE Style Questions Paper 1

iGCSE Biology (0610)-18.3 Selection – iGCSE Style Questions Paper 1

Question

The list shows statements about selection.

  1. Individuals reproduce and pass on their alleles to the next generation.
  2. Genetic variation exists between individuals and many offspring are produced.
  3. Individuals struggle for survival and compete for resources.
  4. Individuals that are better adapted to the environment survive.
  5. Individuals with desirable features are selected by humans.

Which statements are correct descriptions of natural selection?

A) 1, 2, 3 and 4
B) 1, 2 and 5 only
C) 2, 3 and 4 only
D) 3, 4 and 5 only

▶️ Answer/Explanation
Solution

Ans: A

Natural selection involves four key principles: (1) inheritance of alleles, (2) genetic variation and overproduction of offspring, (3) competition for limited resources, and (4) survival of the fittest. These correspond to statements 1–4.

Statement 5 describes artificial selection (human intervention), which is not part of natural selection. Thus, the correct combination is A (1, 2, 3, and 4).

Question

Which statement is an example of natural selection?

A) choosing donkeys with desirable characteristics to breed
B) choosing to cross-pollinate wheat plants with the highest yields
C) inserting genes into a crop plant to improve its nutritional qualities
D) in wild flowers, the development of petals that look like insects to attract pollinators

▶️ Answer/Explanation
Solution

Ans: D

Natural selection occurs in nature without human intervention. Option D describes an evolutionary adaptation where flowers develop insect-like petals to attract pollinators, increasing their reproductive success. Options A, B, and C all describe artificial selection or genetic engineering where humans direct the changes.

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