Estimates vary, but reasonable estimations of extinction rates suggest that extinction is occurring at a
rate approximately __________ above the normal background rate.
a. 10
b. 100
c. 1000
d. 10,000
e. 1,000,000
C
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Binary fission within vacuoles divides which of the following forms of Chlamydia?
a. RB b. EB c. Replicate body d. Initial body
In the evolutionary history of the earth, Homo sapiens probably first appeared approximately ________ years ago.
A) 2,000 B) 20,000 C) 200,000 D) 2,000,000
________ stochasticity is the random variation in birth and death rates that occurs in populations from year to year as a result of natural disasters and other annual variations in the environment
Fill in the blank(s) with correct word
A decreased efficacy of an antimicrobial agent during combination therapy is called
A) antagonism B) cross-resistance C) synergism D) second-line