Many spices are classified as
a. alkaloids.
b. cyanogens.
c. plant pigments.
d. terpenoids.
D
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A technique used to quantify specific types of microbes in natural samples, enrichment cultures, and food or water samples is known as the ________ technique.
Fill in the blank(s) with the appropriate word(s).
The bottleneck effect
A. occurs when many members of a population die, resulting in a great loss of genetic diversity. B. occurs when many members of a population reproduce, causing too much genetic diversity within the population. C. occurs when small groups of individuals leave their home population and establish new settlements, mating only among themselves. D. occurs when large groups of individuals leave their home population and establish new settlements, mating only among themselves. E. does not occur in nature.
In order to produce a recombinant DNA molecule, restriction enzymes are first used to cut the DNA
A. true B. false
Which of the following represents normal fertilization in humans?
A. 2n + 2n = 4n B. n + 2n = 2n C. n + n = 2n D. 2n = n