11 mark
What is a mutation?
A process used in genetic engineering.
A type of continuous variation.
A condition caused by a dominant allele.
A change in a gene.
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Variation & Natural Selection (Cambridge (CIE) IGCSE Co-ordinated Sciences (Double Award): Biology): Exam Questions
Exam code: 0654 & 0973
1 hour16 questions
21 mark
Which of the following characteristics shows discontinuous variation?
Length of foot
Body mass
Tongue rolling ability
Height
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31 mark
Which of the following is not a feature of natural selection?
Production of many offspring.
Selection by humans.
Competition for resources.
Variation in the population.
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11 mark
An island’s entire population of a butterfly species is descended from just two parents that were introduced from the mainland.
Which of the following statements about this butterfly population, compared with that of the mainland, is correct?
The population shows more genetic variety.
The population will adapt more slowly to environmental changes.
The population shows more phenotypic variation.
The population is less in danger of collapsing from disease.
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21 mark
Extended Tier Only
A patient with a bacterial infection is treated with antibiotics, but some of the bacteria survive.
Which statement about the surviving bacteria is correct?
The bacteria have an allele that provides resistance to all antibiotics.
The bacteria are the result of selective breeding.
The bacteria have an allele that provides resistance to the antibiotic used.
The offspring of the bacteria will be more susceptible to the antibiotic.
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11 mark
The graph below shows the height of bean plants grown from 1000 bean seeds.
What type of variation do the plants show?
Discontinuous only.
Continuous only.
Neither continuous or discontinuous variation.
Both continuous and discontinuous variation.
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21 mark
When growing millet, farmers choose seeds from high-yielding plants.
Which of the following is this an example of?
Evolution
Adaptation
Artificial selection
Natural selection
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31 mark
Which row best describes the variation seen in human blood groups?
| has no intermediates | shows continuous variation | shows discontinuous variation |
A | ✓ | X | ✓ |
B | ✓ | ✓ | X |
C | X | ✓ | X |
D | X | X | ✓ |
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