With ____ selection, the frequency of a favored allele will increase as a phenotypic variation becomes more adaptive
a. directional
b. stabilizing
c. disruptive
d. frequent
e. mutational
ANSWER: a
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It is thought that the oldest stage of cellular respiration from an evolutionary perspective is
A. the krebs cycle. B. the electron transport chain. C. fermentation. D. glycolysis.
Who was the first director of the human genome project?
A) James Watson B) Francis Crick C) Jacques Monod D) Craig Venter
Why do mountain streams have rocky bottoms?
A) Large amounts of snow reduce sediment erosion. B) Cold temperatures reduce sediment accumulation C) This is the result of a lack of sediment at high altitudes. D) Steep gradients cause high velocity flows.
Bacteriorhodopsin is a light-sensitive pigment found in ____ archaeans used to supply energy for ____ production.
A. halophilic; ATP B. thermophilic; carbohydrate C. methanogenic; methane D. halophilic; carbohydrate E. thermophilic; ATP