A neuron that transmits an impulse to the central nervous system after the neuron is stimulated by the environment is called a(n) __________.
A) motor neuron
B) sensory neuron
C) autonomic neuron
D) effector
E) interneuron
Answer: B) sensory neuron
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Which of the following is one of the two main
functions of the nuclear envelope? a. provides residence for ribosomes b. allows separation of DNA from cytoplasm machinery c. provides total isolation of nuclear components d. enables faster cell division e. enables larger cell size
Spiny anteaters are unlike other mammals because they
a. have endothermy. b. do not have two pairs of temporal openings in the skull. c. have mammary glands. d. have hair. e. do not have nipples
Most genes have many more than two alleles. However, which of the following is also true?
A) At least one allele for a gene always produces a dominant phenotype. B) Most of the alleles will never be found in a live-born organism. C) All of the alleles but one will produce harmful effects if homozygous. D) There may still be only two phenotypes for the trait. E) More than two alleles in a genotype is lethal.
A chemical used to control microbial growth on inanimate objects is called a(n)
A) microbiocidal. B) microbiostatic. C) antiseptic. D) disinfectant. E) antibacterial agent.