Bird wings and insect wings are considered to be:

a. homologous structures.
b. homogenous structures.
c. vestigial structures.
d. divergent structures.
e. homoplastic structures.


E

Biology & Microbiology

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The cycle of viral infection that will rapidly result in the death of a bacterial cell is called the ________ cycle.

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The direction of genetic information transfer in a retrovirus (such as HIV) is

A. RNA to DNA to mRNA to protein. B. RNA to mRNA to protein. C. RNA to protein. D. DNA to protein. E. DNA to mRNA to protein.

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The biological species concept is based on the idea that individuals in one group are be unable to breed with individuals outside their group. This phenomenon is referred to as ________

Fill in the blank(s) with correct word

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The least common type of polio is

A) nonparalytic polio. B) an asymptomatic infection. C) minor polio. D) paralytic polio. E) postpolio syndrome.

Biology & Microbiology