The first community to occupy a recently denuded region is referred to as
a. climax.
b. diversity.
c. pioneer.
d. mosaic climax.
e. transition.
C
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Relative to the NAD+ molecule in the illustration, how many hydrogens does the NADH molecule possess?
a. one fewer
b. two more
c. one more
d. two fewer
In a series of field experiments, David Tilman and colleagues investigated biodiversity and ecosystem function. They found a relationship between
A. ecosystem diversity and genetic diversity. B. species diversity and genetic diversity. C. ecosystem diversity and species richness. D. species diversity and ecosystem function.
Which step in the Gram stain is the critical step in differentiating gram-positive cells from gram-negative cells?
A) safranin B) alcohol-acetone C) iodine D) crystal violet
PCR-based methods have largely replaced RFLP because of PCR's ability to process ___ samples or ___ samples.
What will be an ideal response?