The slow build-up of differences in the genes between populations is ______.

a) vicariance
b) genetic divergence
c) dispersal
d) genetic equilibrium


Ans: b) genetic divergence

Biology & Microbiology

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In cellular organisms, on average, about one nucleotide in every ____ is mistakenly substituted for another during each round of DNA replication

A. 100 B. 1000 C. 100,000 D. 1 billion E. 10 billion

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Animal pollinators are attracted to plants by

a. a pleasing aroma. b. the appearance of flowers. c. nectar. d. all of these

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The above figure is a photograph of

a. plant with root nodules. b. mycorrhizae. c. root hairs. d. demonstration of the effect of mutualistic Rhizobium. e. microscopic view of a nodule forming around area where the bacterium infect.

Biology & Microbiology

The ________ method provides an estimate of the CFUs (colony-forming units) in a sample.

A. Coulter-counter B. viable plate-count C. streak-plate D. turbidity E. direct microscopic-count

Biology & Microbiology