Which of the following is a function of the human urinary system?
A) detoxification of waste products
B) elimination of undigested foods
C) regulation of water content for body fluids
D) production of ammonia
Answer: C
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In a human fetus that has the XX combination of sex chromosomes, the gonads develop into ovaries
a. True b. False
After an active cytotoxic T cell binds to an
ailing cell, it releases toxins that
a. poke holes in the cell and cause it to die. b. bind to the cell and prevent it from harming other self cells. c. attract macrophages to the cell. d. poke holes in the cell and cause it to die, and bind to the cell and prevent it from harming other self cells. e. cause all of these to occur
Four of the following explain the area effect on island diversity. Which one is the exception?
a. Larger islands have more habitats. b. Smaller islands have more varied and higher elevations. c. Larger islands intercept more colonizers. d. Smaller islands have less complex topography. e. Smaller islands have a greater probability of a species becoming extinct.
Which of the following investigators was (were) responsible for the following discovery? In DNA from any species, the amount of adenine equals the amount of thymine, and the amount of guanine equals the amount of cytosine
A) Alfred Hershey and Martha Chase B) Oswald Avery, Maclyn McCarty, and Colin MacLeod C) Erwin Chargaff D) Matthew Meselson and Franklin Stahl