The same basic array of bones is modified to give rise to the wing of a bat and the fin of a porpoise. Such anatomical structures are called
A. homologous.
B. inherited.
C. analogous.
D. uniform.
E. evolutionary modifications.
Answer: A
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A protein called actin consists of 376 amino acids. The mRNA for actin must be longer than
A. 125 nucleotides. B. 376 nucleotides. C. 1128 nucleotides D. 3384 nucleotides.
Which of the following statements best describes the role of NAD+/NADH in glycolysis?
A) NADH is used to produce energy by directly creating the phosphoanhydride bonds in ATP. B) NAD+ is used to carry electrons. C) NADH is capable of pumping ions during glycolysis. D) NADH is used primarily in substrate-level phosphorylation. E) all of the above
After blood flows through the right ventricle of the human heart, its next major destination is
A. the arms. B. the systemic system. C. the lungs. D. the left ventricle.
The oceans represent an important sink for anthropogenic CO2. In what form is the excess carbon stored?
A) as calcium carbonate sediments B) as solid methane C) as CO2 dissolved in water D) as atomic carbon coatings on inorganic particulates E) none of the above