Unit 4: Continuity and Change
Topic 4.10: Natural Selection Questions
Practice 20 exam-style questions for IB Biology Topic 4.10. Review the question stems below, then unlock the full Question Bank to access markschemes, model answers, and AI grading.
1Identify1 mark
Male birds of one species have evolved brilliant, showy plumage and an elaborate courtship dance that females prefer when choosing a mate.
Which selection pressure is responsible?
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State one result of natural selection acting on a population over many generations.
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Which statement best describes what a selection pressure is?
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Which of the following is the best example of a selection pressure acting on a population?
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State the only process that can introduce a completely new allele into a population.
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Endler studied male guppies in streams with high and low numbers of predators.
What did his experiments mainly demonstrate?
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State the type of selection pressure responsible for the showy, brightly coloured plumage seen in the males of many bird species.
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How does sexual reproduction increase the genetic variation seen in offspring?
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Which order correctly describes how natural selection produces a change in a population?
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State what Endler's experiments on guppy populations demonstrated about natural selection.
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Selection pressures may be abiotic or biotic.
Distinguish between an abiotic and a biotic selection pressure, and give one example of each.
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Which of the following is a result of natural selection acting on a population over many generations?
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Which process is the only source of completely new alleles in a population?
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Which statement correctly describes what changes during natural selection?
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A field is sprayed with the same herbicide every year, and the proportion of resistant weeds rises each season.
Which statement best explains this trend?
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A fungal disease spreads through a forest and kills trees that cannot resist it.
In this example, what is the selection pressure?
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Which of the following would act as an ABIOTIC selection pressure on a plant population?
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• Aimnova practice
Distinguish between continuous variation and discontinuous variation, giving one example of each.
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Natural selection can only change a population if the trait being selected shows a particular kind of variation.
Which kind?
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Which statement about mutations is correct?
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