Which neurotransmitter appears to be associated with an energizing "good" feeling and is essential in hunger, thirst, and sex drive?
A) dopamine
B) serotonin
C) norepinephrine
D) synapse
C
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If all variation among individuals in a population is due to differing genotypes, heritability is ____, and the slope of the line used to measure it is ____
A. 100%; 0.5 B. 100%; 1 C. 50%; 0.5 D. 50%; 1 E. 0%; 0
The heartbeat originates in the:
A. sinoatrial node located at the junction of the vena cava and the right atrium. B. sinoatrial node located at the junction of the vena cava and the left atrium. C. atrioventricular node located in the wall of the atrioventricular valve. D. atrioventricular node located in the tissue separating the atria and ventricles. E. sinoatrial node and atrioventricular node simultaneously.
Molecular clocks are based on _____ mutations
A. advantageous B. lethal C. deleterious D. neutral
The distance between the crests of two
successive waves of light is called
a. wave frequency. b. wave period. c. wave distance. d. wavelength. e. wave space