External fertilization is common in most _____

a. insects
b. amniotes
c. lizards
d. bony fish
e. hydra


ANSWER: d

Biology & Microbiology

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Cytotoxic T lymphocytes are distinguished from other lymphocytes by the presence of ________.

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Immunization for ________ may reduce the incidence of otitis media and sinusitis

A) Mycoplasma pneumoniae B) Mycobacterium tuberculosis C) Propionibacterium acnes D) Corynebacterium diphtheriae E) Streptococcus pneumoniae

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Antimicrobials that are macrolides

A. include azithromycin, clarithromcyin, and erythromycin. B. disrupt cell membrane function. C. are very narrow-spectrum drugs. D. include tetracyclines. E. are hepatotoxic.

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Proteins are polymers of how many different amino acids?

a. 16 b. 20 c. 24 d. 64

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