Otto Loewi demonstrated that neurons transmit signals across synapses by ____
a. electrical signals
b. calcium channels
c. acetylcholine
d. chemical signals
e. proteins
ANSWER: d
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The synthesis of ATP from ADP and Pi is a(n) _____ reaction with a ____ G
A. exergonic; positive B. endergonic; negative C. exergonic; negative D. endergonic; positive E. reversible; 0
The letter “C” in the figure above represents
a. root apical meristem. b. dermal tissue. c. vascular tissue. d. ground tissues. e. ground, dermal, and vascular tissues.
Genetic drift has the strongest effects in populations that are:
a) in Hardy-Weinberg equilibrium. b) small. c) characterized by extensive gene flow. d) undergoing natural selection. e) large.
During which phase in water sewage treatment is natural bioremediation occurring?
A) Primary phase B) Secondary phase C) Tertiary phase D) Final phase