The main site of food absorption in the human digestive system is the
A. stomach.
B. esophagus.
C. small intestine.
D. large intestine.
E. rectum.
C. small intestine.
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The DNA site to which the repressor protein binds is the
A. operon. B. regulon. C. operator. D. repressor
Which statement is true?
a. Haversian canals allow veins and arteries to pass through muscle tissue. b. Canaliculi help to maintain body temperature and protect internal organs. c. Trabeculae are plates that provide structural support to spongy bone tissue. d. Osteoclasts are mutated bone cells that injure the organism by destroying bones.
The radioactive decay of an isotope can be best compared to a ____
a. clock b. radio c. mp3 player d. metronome e. microwave oven
Which activity could help you to slow the rate of global warming?
A) only buy food in plastic containers B) drive faster than the speed limit C) replace an old refrigerator with a new one D) mow the grass more frequently