Nearly everyone has benign tumors in their ____
a. skin
b. large intestines
c. kidneys
d. brain
e. liver
ANSWER: a
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One way in which an archaean would differ from a bacterium is that the archaean would possess no:
A) DNA in its chromosome. B) peptidoglycan in its cell walls. C) ribosomes in its cytoplasm. D) RNA in its ribosomes.
What are trinucleotide repeat expansions?
a. a mutation that creates malformed bases b. repair enzymes that correct nucleotide loops c. mutations that cause codon duplications d. mutations that cause DNA triple helixes
Which hormone shuts down HCl secretion?
a. gastrin b. somatostatin c. leptin d. ghrelin e. secretin
During the 1960s, a group of scientists in the northeastern United States conducted an experiment at Hubbard Brook, New Hampshire. A 38-acre watershed was completely deforested and the runoff (water flow) monitored for several years. It was compared to an adjacent watershed that was left untouched. The scientists collected data during those years and found
A. an insignificant difference in the amount of nitrogen from the two areas. B. a tremendous increase in the total amount of runoff from Hubbard Brook although the loss of nitrogen was fairly consistent in both areas. C. no difference in the amount of runoff from the two areas. D. a tremendous increase in the amount of runoff and nitrogen release from Hubbard Brook compared to the control.