What organisms did Darwin study in detail during his time in the Galapagos Islands that solidified his theory natural selection?

a. finches
b. tortoises
c. iguanas
d. fish


a. finches

Biology & Microbiology

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Which of the following reduces gene flow between the gene pools of the two species on Sao Tomé, despite the existence of hybrids?

A) gametic isolation B) reduced hybrid viability C) hybrid sterility D) temporal isolation E) a geographic barrier

Biology & Microbiology

One of the two main angiosperm clades, the ____, has about 60,000 species that are characterized by a single

cotyledon and pollen grains with one groove; additionally, most have parallel-veined leaves.

a. eudicots

b. laurels c. monocots d. water lilies e. magnoliids

Biology & Microbiology

A period of geographic isolation always results in the evolution of reproductive isolation

a. true b. false

Biology & Microbiology

Which of the following is in the correct sequential order?

a) A tadpole is cloned, a better breed of corn is created through artificial selection, a test tube baby is born, Dolly is born b) A better breed of corn is created through artificial selection, a tadpole is cloned, a test tube baby is born, Dolly is born c) A better breed of corn is created through artificial selection, a test tube baby is born, a tadpole is cloned, Dolly is born d) All of the above

Biology & Microbiology