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

Biology & Microbiology

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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

Biology & Microbiology

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.

Biology & Microbiology

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

Biology & Microbiology

PCR-based methods have largely replaced RFLP because of PCR's ability to process ___ samples or ___ samples.

What will be an ideal response?

Biology & Microbiology