The phenotypic expression of a genotype can be altered by
A)
developmental processes.
B)
environmental conditions.
C)
physiological conditions.
D)
all of the above
Answer:
D
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Which of the following must the human body obtain from the environment in order to survive?
A. Nitrogen B. Water C. Carbon dioxide D. Wastes
Autonomic tone is an important aspect of ANS function because it
A) allows ANS neurons to be silent under normal conditions. B) allows ANS neurons to increase activity on demand but not decrease their activity. C) allows ANS neurons to decrease their activity on demand but not increase their activity. D) allows ANS neurons to increase or decrease their activity, providing a range of control options. E) provides for a narrow range of control options that keeps target tissues constantly active.
When a stimulus is continually applied but the action potential frequency declines, this is called
A) Receptor attenuation. B) Receptor acclimation. C) Receptor accommodation. D) Receptor adaptation.
All cells are capable of reproducing
Indicate whether the statement is true or false