Each amino acid is specified by a set of base(s) in mRNA
a. one
b. two
c. three
d. four
d
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Heritability of a trait applies only to its variation in a particular population across the range of environments that exist for that population at a given time
A. true B. false
The pleasurable feeling one gets from taking
Ecstacy is related to the neurotransmitter
a. endorphin. b. acetlycholine. c. dopamine. d. serotonin. e. epinephrine.
The sliding-filament model of muscle contraction is described by the action of ____ pulling ____ inward
a. muscle fibers; actin filaments b. myofilaments; sarcomeres c. sarcomeres; Z lines d. actin filaments; myosin filaments e. myosin filaments; actin filaments
Bone performs four of the following functions. Which is the exception?
a. movement in conjunction with skeletal muscle b. protection for internal organs c. mineral storage for calcium and potassium d. protection of central nervous system e. blood cell formation