The most abundant waste product of metabolism is
a. carbon dioxide.
b. ammonia.
c. urea.
d. uric acid.
e. water.
A
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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.
Which type of trait is most likely to have arisen through sexual selection? a. Stronger jaws in snapping turtles
b. Faster running ability in rabbits. c. Elongated eyestalks in Malaysian flies. d. Dark fur in pocket mice. e. Laying three eggs instead of one.
Good rubrics and the information they provide can help with all of the following EXCEPT:
a. Assign accurate grades b. Differentiate instruction c. Distribute selected response items d. Help students self-assess