In biological magnification,
a. poisons build up in food chains and webs so that the concentration is highest at the high
end of the food chain.
b. there is a tendency for an environment to change when organisms first invade.
c. more highly evolved forms are able to build large populations under favorable conditions.
d. parasites spread rapidly through congested populations.
e. sediments fill in aquatic environments so that succession will occur if organisms disturb
the aquatic habitat.
A
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Nucleic acid techniques have great power as diagnostic tools because they may be
A. very specific. B. quick and easy to perform. C. used to enhance the growth of bacteria. D. used to selectively inhibit the growth of certain bacteria.
Ancestral character states were present in the ancestor of a clade
1.True 2.False
As part of the fertilization process, the egg completes meiosis I
____________________ Indicate whether the statement is true or false.
Which of the following drugs inhibits nucleic acid synthesis specifically in most bacteria?
A) fluoroquinolones B) actinomycin C) rifampin D) tetracycline E) 5-fluorocytosine