The evolutionary innovation that first appeared in arthropods and is characteristic of the most successful of all animal groups is that of

A. three primary types of tissues.
B. bilateral symmetry.
C. segmentation.
D. coelomic body architecture.
E. jointed appendages.


Answer: E

Biology & Microbiology

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a. natural selection. b. genetic drift. c. mutation. d. gene flow.

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Refer to the accompanying table. What is the frequency of the dd genotype?

a. 0.1 b. 0.2 c. 0.4 d. 0.6 e. 1.2

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From what environment were Archaea first isolated?

a. from salt lakes b. from Mars c. from freshwater lakes d. from a human patient

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Passive immunization, in which a person is given antibodies, is a type of ___________

A) Autoimmunity B) Innate immunity C) Immunotherapy D) Cell-mediated immunity

Biology & Microbiology