Which cells mature in the thymus gland?
a. T cells
b. mast cells
c. macrophages
d. neutrophils
e. eosinophils
ANSWER: a
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All prokaryotes initiate the synthesis of proteins with formylmethionine.
Answer the following statement true (T) or false (F)
A change in a single nucleotide that results in no change in the amino acid sequence of the polypeptide produced is known as a
A) nonsense mutation. B) silent mutation. C) missense mutation. D) frameshift mutation. E) none of the above
Which populations are at greatest risk for extinction?
A) very small ones B) very large ones C) ones with specific niches D) ones with extensive habitat ranges
Which of the following vertebrates has a social structure most closely resembling social insects?
a. the phalarope b. lions c. the naked mole rats d. Siberian tigers e. chimpanzees