In 2011, the largest dollar volume of imports for the U.S. came from
a. consumer goods.
b. industrial supplies.
c. petroleum.
d. automobiles.
b. industrial supplies.
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Systemin can correctly be described as a(n)
A. peptide. B. apoplast. C. receptor. D. leaf lipid. E. carbohydrate.
MDMA, the active ingredient in Ecstacy,
a. interferes with the removal of serotonin by transport proteins. b. causes an increased release in the neurotransmitter, dopamine. c. blocks the movement of epinephrine across the synaptic cleft. d. binds to endorphins making them unavailable. e. causes the rapid transport of acetylcholine across the synaptic cleft.
Which of the following is true of embryo cloning?
a. It occurs all the time in nature. b. It involves the genetic contribution of only one parent. c. It produces identical offspring. d. “Artificial twinning” is a laboratory application of the process. e. All of these are true.
Which of the following cavities has the highest density of cardiac muscle tissue?
A) pleural cavity B) abdominal cavity C) thoracic cavity D) cranial cavity