The "one-gene/one-enzyme" hypothesis was proposed by
A. Watson and Crick.
B. Griffith.
C. Garrod.
D. Franklin.
E. Beadle and Tatum.
E. Beadle and Tatum.
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Which of the following is NOT true about prolonged
drought? a. It is very rare. b. Some are known to have lasted more than 200 years. c. It contributed to the collapse of the Mayan civilization. d. Afghanistan has recently suffered its worst in 100 years. e. It impacts global food supplies.
In a dicot stem, what is the ring of cells that includes the xylem?
A) apical meristem B) vascular cambium C) cork cambium D) epidermal tissue
The receptor potential is the
A) membrane potential produced when a neurotransmitter molecule binds to its receptor. B) membrane potential produced in the receptor cell by sensory transduction. C) electrical signal produced by an action potential. D) membrane potential produced at a muscle cell.
An attack on an abortion clinic would MOST likely be carried out by a/an:
A) single-issue group. B) technology terrorist. C) violent religious group. D) extremist political group.