(WGU C736) BIO 3261 - Evolution - OA Review .(WGU C736) BIO 3261 - Evolution - OA Review .(WGU C736) BIO 3261 - Evolution - OA Review .(WGU C736) BIO 3261 - Evolution - OA Review .
,1. Which of the following mechanisms primarily drives adaptive
radiation?
a) Genetic drift
b) Natural selection
c) Gene flow
d) Mutation
Correct Answer: b) Natural selection
Rationale: Adaptive radiation occurs when a single ancestor
diversifies into many forms that adapt to different environments,
primarily driven by natural selection.
2. Which scientist is credited with the formulation of the modern
synthesis of evolutionary theory?
a) Charles Darwin
b) Gregor Mendel
c) Theodosius Dobzhansky
d) Ernst Mayr
Correct Answer: c) Theodosius Dobzhansky
Rationale: Dobzhansky played a key role in integrating
Mendelian genetics with Darwinian evolution, leading to the
modern synthesis.
, 3. In the context of speciation, which term refers to the formation
of new species due to geographical separation?
a) Sympatric speciation
b) Parapatric speciation
c) Allopatric speciation
d) Reproductive isolation
Correct Answer: c) Allopatric speciation
Rationale: Allopatric speciation occurs when populations are
geographically isolated, leading to divergent evolution.
4. Which of the following is NOT a type of natural selection?
a) Directional selection
b) Stabilizing selection
c) Disruptive selection
d) Speculative selection
Correct Answer: d) Speculative selection
Rationale: Speculative selection is not a recognized type of
natural selection; the other three are well-defined modes.
5. What is the primary role of genetic drift in evolution?
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