Turtles are members of which of the following lineages?
a. Testudines
b. Archosauromorpha
c. Squamata
d. Sphenodontia
e. Amphibia
A
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For a pure culture of Saccharomyces cerevisiae cells that were all derived from a single cell to mate,
A) a mating-type switch in one or more cells in the culture must occur. B) both the ? and the a gene must be fully expressed in the population. C) the ? gene must be fully repressed in the population. D) some cells must exist as diploids.
Four of the five answers listed below can function to isolate populations. Select the exception
a. geography b. behavior c. time d. gametes e. external fertilization
The primers in PCR are
a. fragments of mRNA. b. designed to base pair with mRNA. c. free nucleotides. d. radioactive. e. none of these
The genetic code is made up of codons consisting of
how many nucleotides? a. 2 b. 3 c. 5 d. 6 e. 9