Synonymous mutations are found much more frequently than nonsynonymous mutations because
A) mutations do not occur randomly
B) the genetic code is redundant.
C) of genetic drift.
D) there is a selective advantage in looking like another species.
E) changes in the amino acid sequence of proteins are likely to be harmful.
E
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Which aspect of phospholipids is most important to the formation of bilayers?
A) They are amphipathic. B) Their size is large, relative to cholesterol. C) Their size is small, relative to fats. D) Their hydrocarbon tails can consist of fatty acids or isoprene subunits.
Four of the following are C3 grasses. Which one is the exception?
a. wheat b. oats c. barley d. rice e. legumes
Nucleic acid hybridization is the pairing between
a. cDNA and DNA. b. mRNA and cDNA. c. mRNA and DNA. d. mRNA and tRNA. e. DNA or RNA from more than one source.
The famous skeleton named Lucy belong to which species?
a. Homo erectus b. Homo habilis c. Australopithecus afarensis d. Homo floresiensis e. Neanderthals