Gastric bypass surgery is effective in part
because it
a. increases ghrelin levels.
b. decreases ghrelin levels.
c. increases leptin levels.
d. decreases leptin levels.
e. increases ghrelin levels and decreases leptin
levels.
A
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How do sperm move to fertilize eggs?
A. with flagella made of actin B. by diffusion C. with cilia made of actin D. with flagella made of microtubules E. with cilia made of microtubules
The Social Security fund is maintained by a federal tax on the earnings of employed people. Which group of workers should be encouraged to live temporarily in the country?
A) young unmarried males B) young married couples C) elderly females D) retired couples
Gini index is a statistical measure of the:
A) collective progressivity. B) global income inequality. C) standard of living in a country. D) income inequality across a geographic area.
The prochlorophytes are unique among the Cyanobacteria in that ALL species in the group contain
a. chlorophyll a and b. b. bacteriochlorophyll. c. phycobilins. d. all of the above.