Differentiation of cells begins
a. during the period of the embryo. c. during the period of the zygote.
b. during the period of the fetus. d. at birth.
c
Psychology
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The doctrine of specific nerve energies states that:
a. each type of sensory receptor releases a different type of energy. b. different sensory nerves release different neurotransmitters. c. each sensory neuron can respond to all sensory modalities. d. what a person experiences depends on which nerve was stimulated.
Psychology
Of the four basic elements of classical conditioning, the one the organism learns to respond to is the:
a. US. b. UR. c. CS. d. CR.
Psychology