Ziauddin University Medical Entry Test Biology: Evolution MCQs

Practice Evolution MCQs for Ziauddin University Medical Entry Test Biology — topic-wise sets with solved answers.

Ziauddin University Medical Entry Test Biology: Evolution MCQs — sample questions

  1. Question 1

    Q1. A population of birds living on an isolated island has a unique beak shape. What drives the evolution of this trait?

    • A) Genetic drift
    • B) Natural selection
    • C) Mutation
    • D) Gene flow

    Answer: Natural selection

    Explanation: Natural selection favors unique beak shape, unlike genetic drift which is random.

  2. Question 2

    Q2. A species of bacteria develops resistance to an antibiotic. What is the primary mechanism behind this adaptation?

    • A) Horizontal gene transfer
    • B) Vertical gene transfer
    • C) Natural selection
    • D) Genetic drift

    Answer: Horizontal gene transfer

    Explanation: Horizontal gene transfer allows for rapid sharing of resistance genes, unlike vertical transfer.

  3. Question 3

    Q3. Fossil records show a gradual change in the morphology of a species over time. What does this pattern suggest?

    • A) Punctuated equilibrium
    • B) Phyletic gradualism
    • C) Convergent evolution
    • D) Divergent evolution

    Answer: Phyletic gradualism

    Explanation: Phyletic gradualism explains gradual changes, unlike punctuated equilibrium which shows rapid changes.

  4. Question 4

    Q4. A species of fish has a unique fin structure that is not seen in its closest relatives. What could explain this anomaly?

    • A) Adaptive radiation
    • B) Convergent evolution
    • C) Evolutionary innovation
    • D) Genetic drift

    Answer: Evolutionary innovation

    Explanation: Evolutionary innovation leads to new traits, unlike convergent evolution which mimics existing traits.

  5. Question 5

    Q5. A population of insects has a genetic variation that allows them to survive in a polluted environment. What process leads to the increase of this variation?

    • A) Mutation
    • B) Gene flow
    • C) Genetic drift
    • D) Natural selection

    Answer: Natural selection

    Explanation: Natural selection favors the survival of insects with the beneficial variation, unlike genetic drift which is random.

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