Mechanisms that help generate heat and those that allow release of heat are an example of ________. Collectively, these mechanisms increase the ________ of body temperature.
A. poikilothermic regulation; stability
B. ectothermic regulation; flexibility
C. antagonist effectors; stability
D. endothermic regulation; flexibility
Answer: C
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The chemical composition of the gases surrounding the Earth has changed substantially over the past 4 billion years. One notable change was due to the emergence of organisms that photosynthesized. Their photosynthesis increased the amount of which of the following gases in the atmosphere?
A. Carbon dioxide (CO2). B. Nitrogen (N2). C. Hydrogen sulfide (H2SO4). D. Oxygen (O2). E. Water vapor (H2O).
Glycolysis takes place in the mitochondria
Indicate whether the statement is true or false.
Which soil region is the most fertile soil layer where the roots of most herbaceous plants are located?
a. A horizon b. B horizon c. C horizon d. D horizon e. O horizon
Two genes that are close together on the same chromosome will cross over more frequently than two genes that are further apart.
Answer the following statement true (T) or false (F)