Evolution MCQs for MDCAT Practice

Biology section, Evolution chapter. Sample questions from past PMC papers.

1. Question 1
   A population of birds encounters a dramatic event that results in a severe decrease in population size. As a result of the newly decreased population, what type of genetic drift does this population now exhibit?
   • A.Artificial selection
   • B.Founder effect
   • C.Bottleneck effect
   • D.Both a and b
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2. Question 2
   The oldest known fossils belong to which organisms?
   • A.Virus
   • B.Bacteria
   • C.Plants
   • D.Animals
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3. Question 3
   Of all the texa, the only one that exists in nature as a biologically cohesive unit is the:
   • A.genus
   • B.phylum or division
   • C.kingdom
   • D.species
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4. Question 4
   Another theory of natural selection other than Darwin was developed by
   • A.Wallace
   • B.Lyell
   • C.Linnaeus
   • D.Lamarck
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5. Question 5
   What are fossils?
   • A.Remains of living organisms preserved in sedimentary rocks
   • B.Remains of dead organisms found in igneous rocks
   • C.Impressions of ancient organisms found in metamorphic rocks
   • D.Remains of organisms preserved in ice or amber
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6. Question 6
   The human population today can best be described as
   • A.declining
   • B.growing linearly
   • C.at the carrying capacity
   • D.growing exponentially
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7. Question 7
   The smallest taxon in plant nomenclature is:
   • A.Order
   • B.Species
   • C.Phylum
   • D.Class
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8. Question 8
   Homologous organs show similarity in:
   • A.Shape
   • B.Origin
   • C.Function
   • D.Size
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