The disadvantages of using distance methods to construct trees include the fact that:
a. distance methods lack any sort of underlying evolutionary model.
b. the assumption is made that similarity is a reflection of homology.
c. Both of the above.
d. Neither of the above.
C
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The carbon cycle begins with ________.
A. anaerobic respiration B. aerobic respiration C. the conversion of carbon dioxide to methane D. carbon dioxide fixation
Vitamin B3 is a precursor of ____
a. NADH b. ATP c. DNA d. RNA e. FADH
Oxygen atoms in H2O In photosynthesis, the oxygen atoms in H2O are energized.
a) reduced. b) reformed into other elements. c) oxidized. d) broken down.
The underlying phenomenon that makes selective breeding or artificial selection possible is genetic variation. It is possible to have phenotypic variation in natural populations because of....
A. artificial selection. B. gene inversion. C. differences in alleles for a specific trait. D. similarity in alleles for a specific trait. E. both artificial selection and gene inversion.