Which domain(s) consist of prokaryotic organisms?

a. Bacteria only
b. Archaea and Eukarya
c. Bacteria and Eukarya
d. Bacteria and Archaea
e. Archaea, Bacteria, and Eukarya


ANSWER: d

Biology & Microbiology

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A population in Hardy-Weinberg equilibrium

a. consists of allele frequencies that are constantly changing. b. is under no selective pressures. c. consists of genotype frequencies that are constantly changing. d. is very common in nature. e. requires a small population size.

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Demographics include population __________ and __________ structure, such as the size of the __________ base. Fill in the blank(s) with the appropriate word(s)

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The geologic time scale is subdivided on the

basis of a. the appearance of different radioactive isotopes in different strata. b. levels of background extinction. c. periods of mass extinction. d. the appearance of different radioactive isotopes in different strata and levels of background extinction. e. the appearance of different radioactive isotopes in different strata, levels of background extinction, and periods of mass extinction.

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Malaria is caused by a parasitic dinoflagellate and is transmitted by the Anopheles mosquito

1.True 2.False

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