A major change in evolutionary patterns over long periods of time is best described as ____

a. macroevolution
b. microevolution
c. allopatric speciation
d. directional selection
e. sympatric speciation


ANSWER: a

Biology & Microbiology

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The three periods of the Mesozoic era in sequence from most ancient to most recent are

A. Permian, Triassic, and Jurassic. B. Cretaceous, Jurassic, and Triassic. C. Silurian, Ordovician, and Cambrian. D. Triassic, Jurassic, and Cretaceous. E. Cambrian, Ordovician, and Silurian.

Biology & Microbiology

The effect of population growth limiting

factors begin to become evident at about a. A. b. B. c. C. d. D. e. E

Biology & Microbiology

Variation among individuals that is due to factors other than genetic factors is called ________

A) phenotypic variation B) environmental variation C) broad-sense heritability D) narrow-sense heritability

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In Figure 34-2, the palisade mesophyll is labeled:


a. 1.
b. 2.
c. 3.
d. 6.
e. 9.

Biology & Microbiology