A woman visits her doctor's office complaining of pattern baldness. Her mother and father do not have pattern baldness, but her brother does. The doctor is concerned that she may have the serious condition of __, and he immediately orders blood tests to check her ________ levels.
A. tumor of the adrenal gland, 5-dihydrotestosterone
B. tumor of the reproductive system, testosterone
C. skin cancer, 2,5 alpha-reductase
D. tumor of the adrenal gland, estradiol
E. tumor of the reproductive system, 5-dihydrotestosterone
A. tumor of the adrenal gland, 5-dihydrotestosterone
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Which of the following would be LEAST likely to use the results of scientific research in his or her daily profession?
A. farmer B. doctor C. baseball player D. violin maker
Fraternal twins develop when:
A) two eggs are fertilized by one sperm. B) multiple ovulations occur, and two eggs are fertilized. C) one egg is fertilized by one sperm, but the resulting cells separate from one another and continue development. D) one egg is fertilized by two sperm.
Food moved to the back of the mouth by the tongue causes all of the following EXCEPT
A. the swallowing center stimulates successive waves of muscle contraction in the esophagus. B. covering the opening of the larynx by the epiglottis. C. pressure against the pharynx to initiate swallowing. D. elevation of the soft palate to seal off the nasal cavity. E. churning of the stomach contents.
Herbivores would usually be placed in which trophic level?
A) third B) either the third or fourth C) second D) fourth E) first