. “Seasonal,” “daily,” and “monthly” all describe what

type of reproductive isolating mechanism?
a. behavioral
b. temporal
c. mechanical
d. gamete
e. ecological


Answer: b

Biology & Microbiology

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Which medium can be described as containing crystal violet dye to inhibit the growth of gram-positive bacteria and fungi and allows many types of gram-negative bacilli to grow?

a. Thayer-Martin agar b. MacConkey agar c. PEA d. Hektoen enteric agar

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The structure indicated by the letter "B" above

represents a. actin. b. myofibril. c. myosin. d. sarcoplasmic reticulum. e. muscle fiber

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If during the Gram stain procedure, the bacterial cells were viewed immediately after crystal violet was applied, gram-positive cells would be purple but gram-negative cells would be colorless.

Answer the following statement true (T) or false (F)

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Symptoms of secondary syphilis include

a. generalized skin rash. b. lesions. c. fatal cardiovascular infections. d. both a and c.

Biology & Microbiology