An individual is exposed to a pathogen and takes five days to recover. When exposed a year later they again take five
days to recover. Would you suspect that adaptive immunity was involved? Why or why not? What will be an ideal response?
ANSWER: No, in cases where adaptive immunity is involved the recovery to the second exposure would
be much quicker. It is likely that innate immune responses were involved.
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Which of the following mammals has NOT been successfully cloned?
a. sheep b. pigs c. humans d. nonhuman primates e. dogs
The earliest animal fossils
A. are about 2.5 billion years old. B. are of marine organisms. C. are of insects. D. None of the above is correct.
Cytokinesis in animal cells involves the formation of a/an:
a. oncogene b. cell plate c. cleavage furrow d. sister chromatid
Which of the following is the largest artery of the systemic circuit?
A. vena cava B. carotid artery C. pulmonary artery D. aorta E. femoral artery