. F. Skinner first introduced operant conditioning experiments. What happens in these experiments?
A. An animal learns to associate its behavioral response with a fixed action pattern.
B. An animal learns to associate its behavioral response with an instinct.
C. An animal learns to associate its behavioral response with its biological clock.
D. An animal learns to associate its behavioral response with a reward or a punishment.
E. An animal learns to associate its behavioral response with a conditional stimulus.
D. An animal learns to associate its behavioral response with a reward or a punishment.
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The sweetener aspartame is a known excitotoxin. With regard to nerve cells, ingestion of this substance results in chronic nerve stimulation. With your knowledge of action potentials, this toxin must
A) stimulate continual impulses at the cell body. B) stimulate continual impulses at the dendrite. C) bind the nodes of Ranvier. D) block the synaptic cleft. E) stimulate continual impulses at the presynaptic receptors.
Crossing-over that occurs only between two specific DNA target sites that are usually less than 200 base pairs long is called
A) mitotic recombination. B) integrative recombination. C) site-specific recombination. D) homologous recombination. E) non-random recombination.
In sea urchins, the fertilization envelope forms from the:a
vitelline envelope. b. jelly coat. c. zona pellucida. d. plasma membrane. e. granulosa cells.
The common house mouse species, Mus musculus, has the following classification: Musculus, Mus , Muridae, Rodentia, Mammalia, Chordata, Animalia, Eukarya. What part of the name is the family?
A. Rodentia B. Muridae C. Animalia D. Chordata