According to the text, __________ major mass
extinction(s) and recovery(ies) has(have) taken place
in the past.
a. 1
b. 2
c. 3
d. 4
e. 5
Answer: e
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Restriction is
A) the viral process whereby a host's DNA ceases normal functioning. B) the viral process whereby the virus prevents other viruses from entering the cell. C) a general host mechanism to prevent the invasion of foreign nucleic acid. D) a general host mechanism to prevent virus particles from further infective action.
Is photosynthetic O2 production light-dependent?
a. Yes b. No
The tube leading from each kidney to the urinary
bladder is the a. glomerulus. b. ureter. c. urethra. d. bladder. e. rectum.
Species richness is a measure of both the number of species and the relative importance of each
species based on its abundance, productivity, or size. ____________________ Indicate whether the statement is true or false.