It is the morning of a big test. You are very
nervous about it. Your heart is racing and your
blood pressure is increased. You are feeling the
effects of the ___ division of the ___ nervous
system.
a. parasympathetic--autonomic
b. parasympathetic--somatic
c. sympathethic--autonomic
d. sympathetic--somatic
e. autonomic--somatic
C
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Which of the following is a major influence on the direction of evolution (which organisms go extinct and which new ones evolve)?
A. the environmental conditions a species encounters B. the size of the Earth C. mutations in the cells that do not form gametes D. floods, tornados, earthquakes, and hurricanes
An element has eight protons, nine neutrons, and eight electrons. Its atomic number and atomic mass, respectively, are __________.
a. 8 and 16 b. 8 and 17 c. 9 and 16 d. 9 and 17 e. 16 and 8
Reinforcement is most likely to drive the evolution of
A. postzygotic isolating mechanisms, because selection acts after the formation of hybrids. B. prezygotic isolating mechanisms, because selection favors alleles that prevent hybridization. C. prezygotic isolating mechanisms, because selection favors alleles that promote hybridization. D. postzygotic isolating mechanisms, because hybrids have low fitness relative to the parents.
________ is the carrier molecule required to transport peptidoglycan subunits to the location where they will be incorporated into the growing bacterial cell wall.
A. UDP glucose B. Malonyl-CoA C. Acyl carrier protein D. Bactoprenol