Nerve agents block _______________, an essential enzyme of the nervous system.
A) epinephrine
B) acetylcholine
C) norepinephrine
D) cholinesterase
Answer: D) cholinesterase
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Staphylococcus aureus is known to cause ALL of the following diseases EXCEPT
A) acne. B) arthritis. C) boils. D) dental caries.
Two of Darwin's finches display a character displacement when they occur as sympatric species. Which of the statements correctly interprets the graph?
A. Both species have the same size beak on Santa Maria Island.
B. Both species have the same size beaks on Daphne Major.
C. Both species have the same size beaks on Los Hermanos Island.
D. The two species have different beak sizes when they occur on the same island.
E. The two species feed on different food resources; one feeds on seeds while the other feeds on insects.
Which of the following is NOT true about regenerative medicine?
A) Stem cells are involved. B) Repair of damaged tissues takes place. C) Ethical debates have happened around regenerative medicine. D) There are no U.S. companies working on regenerative medicine. E) Regenerative medicine has made progress in bladder and kidney treatments.
A terrestrial animal species is discovered with the following larval characteristics: exoskeleton, system of tubes for gas exchange, and modified segmentation
A knowledgeable zoologist should predict that the adults of this species would also feature _____. A) eight legs B) two pairs of antennae C) a sessile lifestyle D) an open circulatory system