Within the chordate classes, the unique characteristic of the class Aves is:
a. flight.
b. production of uric acid.
c. feathers.
d. endothermy.
e. a forked tongue
c
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The codon UGA specifies
A) a stop signal in the universal genetic code and in human mtDNA. B) the amino acid tryptophan in the universal genetic code and in human mtDNA. C) formyl-methionine in mtDNA. D) a stop signal in the universal genetic code and the amino acid tryptophan in human mtDNA.
Bulk movement of water across plasma membranes and the exchange of oxygen from blood into cells are similar in that the method of transport is by
A) facilitated transport. B) endocytosis. C) diffusion. D) active transport. E) sodium-potassium pumps.
go hand in hand. Salts located in water, when water leaves organism via evaporation, salt concentration increases
What will be an ideal response?
The effects of a transposition event are equivalent to a(n)
A) nonsense mutation. B) missense mutation. C) frameshift mutation. D) silent mutation. E) HFR conjugation.