The baleen whale which carries the most barnacles is the
a. right whale.
b. sperm whale.
c. gray whale.
d. orca.
e. blue whale.
C
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GGG and GGC are codons for the amino acid, glycine. A mutation caused the insertion of a cytosine in place of the guanine during DNA replication. Over many generations the DNA changes so that the frequency of GGC is similar to that of GGG. What effect does this mutation have on the population's mean fitness?
A. As the frequency of the GGC codon increases, the population's mean fitness level will remain the same.
B. As the frequency of the GGC codon increases, the population's mean fitness level will initially increase, but once GGC and GGG occur with equal frequency, the mean fitness will decrease.
C. As the frequency of the GGC codon increases, the population's mean fitness level will decrease.
D. As the frequency of the GGC codon increases, the population's mean fitness level will increase.
From the standpoint of evolutionary fitness, it is expected that genes with a high rate of expression will make use of amino acids that are ________ than those amino acids used by genes with a low rate of expression
A) more common B) more energetically economical C) more energetically costly D) rarer E) None of these
The oldest eukaryote identified in fossil records is thought to have appeared about ____ million years ago.
Fill in the blank(s) with the appropriate word(s).
What was the best water concentration to use to be able to achieve the highest efficiency?