Practice Evolution MCQs for Pharm-D Entry Test (D Pharmacy) Biology — topic-wise sets with solved answers.
Q1. A population of birds living on an isolated island has a unique beak shape. What drives the evolution of this trait?
Answer: Natural selection
Explanation: Natural selection favors unique beak shape, unlike genetic drift which is random.
Q2. A species of bacteria develops resistance to an antibiotic. What is the primary mechanism behind this adaptation?
Answer: Horizontal gene transfer
Explanation: Horizontal gene transfer allows for rapid sharing of resistance genes, unlike vertical transfer.
Q3. Fossil records show a gradual change in the morphology of a species over time. What does this pattern suggest?
Answer: Phyletic gradualism
Explanation: Phyletic gradualism explains gradual changes, unlike punctuated equilibrium which shows rapid changes.
Q4. A species of fish has a unique fin structure that is not seen in its closest relatives. What could explain this anomaly?
Answer: Evolutionary innovation
Explanation: Evolutionary innovation leads to new traits, unlike convergent evolution which mimics existing traits.
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?
Answer: Natural selection
Explanation: Natural selection favors the survival of insects with the beneficial variation, unlike genetic drift which is random.
Q6. A species of plant has a unique photosynthetic pathway that is different from its closest relatives. What could explain this difference?
Answer: Evolutionary innovation
Explanation: Evolutionary innovation leads to new metabolic pathways, unlike horizontal gene transfer which shares existing genes.
Q7. Fossil records show that a species of dinosaur had feathers. What does this discovery imply?
Answer: The dinosaur had a unique evolutionary history
Explanation: Feathers imply a unique evolutionary history, unlike being a direct ancestor of birds.
Q8. A population of bacteria has a high rate of mutation due to exposure to a mutagenic agent. What is the primary effect of this increased mutation rate?
Answer: Increased genetic variation
Explanation: Increased mutation rate leads to increased genetic variation, unlike decreased genetic variation.
Q9. A species of animal has a unique mating behavior that is not seen in its closest relatives. What could explain this anomaly?
Answer: Evolutionary innovation
Explanation: Evolutionary innovation leads to new behaviors, unlike convergent evolution which mimics existing behaviors.
Q10. Fossil records show a pattern of rapid evolution followed by long periods of stasis. What does this pattern suggest?
Answer: Punctuated equilibrium
Explanation: Punctuated equilibrium explains rapid evolution followed by stasis, unlike phyletic gradualism.
Q11. A population of insects has a genetic variation that allows them to develop resistance to a pesticide. What process leads to the increase of this variation?
Answer: Natural selection
Explanation: Natural selection favors the survival of insects with the beneficial variation, unlike genetic drift which is random.
Q12. A species of plant has a unique root structure that is adapted to a specific soil type. What could explain this adaptation?
Answer: Evolutionary innovation
Explanation: Evolutionary innovation leads to new adaptations, unlike convergent evolution which mimics existing adaptations.
Q13. A population of animals has a high rate of gene flow due to migration. What is the primary effect of this increased gene flow?
Answer: Increased genetic variation
Explanation: Increased gene flow leads to increased genetic variation, unlike decreased genetic variation.
Q14. Fossil records show that a species of animal had a unique characteristic that is not seen in its closest relatives. What does this discovery imply?
Answer: The animal had a unique evolutionary history
Explanation: Unique characteristic implies a unique evolutionary history, unlike being a direct ancestor.
Q15. A species of bacteria has a unique metabolic pathway that is different from its closest relatives. What could explain this difference?
Answer: Evolutionary innovation
Explanation: Evolutionary innovation leads to new metabolic pathways, unlike horizontal gene transfer which shares existing genes.
Q16. A population of animals has a high rate of genetic drift due to a bottleneck event. What is the primary effect of this increased genetic drift?
Answer: Decreased genetic variation
Explanation: Increased genetic drift leads to decreased genetic variation, unlike increased genetic variation.
Q17. A species of plant has a unique photosynthetic pathway that is adapted to a specific environment. What could explain this adaptation?
Answer: Evolutionary innovation
Explanation: Evolutionary innovation leads to new adaptations, unlike convergent evolution which mimics existing adaptations.
Q18. In a population of finches, a genetic mutation leads to variation in beak shape. What drives the increase in frequency of this trait over time?
Answer: Natural selection
Explanation: Beak shape variation increases due to natural selection, not genetic drift, as it provides adaptive advantage.
Q19. In a species of bacteria, antibiotic resistance emerges due to a genetic mutation. What is the primary mechanism by which this trait spreads?
Answer: Horizontal gene transfer
Explanation: Antibiotic resistance spreads mainly through horizontal gene transfer, not vertical.
Q20. A species of bird migrates to a new habitat, resulting in reproductive isolation. What type of speciation is this an example of?
Answer: Allopatric speciation
Explanation: Allopatric speciation occurs due to geographical barriers, unlike sympatric speciation.
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