What is the most radiosensitive phase of the cell cycle?
a) Mitosis
b) G1
c) Synthesis
d) G2
Ans: a) Mitosis
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The filtration step in the formation of urine for animals sorts materials only by
A. overall size with cells and proteins usually being kept out of the filtrate. B. whether they are charged or not. C. whether the substance in question is a waste product or not. D. whether they contain nitrogen or not. E. the hydration state of the body.
Finding a very large crater in the Gulf of Mexico
provided support for the a. gradual model of speciation. b. central dogma. c. biological species concept. d. K-T asteroid impact theory. e. cell theory.
Summarize the arguments both for and against irradiating foods. What will be an ideal response?
Which species is believed to have been the first ones to develop stone tool technology?
A. Homo erectus B. Neanderthal man C. Homo habilis D. Cro-Magnon man