If an XY human had a genetic disorder that causes insensitivity to androgens, that person's genotype and phenotype would be
A. XY, male.
B. XY, female.
C. XX, male.
D. XX, female.
Answer: B
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In island biogeography, larger islands support ______ species than smaller islands.
A. more B. fewer C. larger D. stranger E. smaller
Which plants are widely planted in cities because of their resistance to insect predators, air pollution, and disease?
a. horsetails b. ginkgoes c. pines d. spruces
e. junipersSpecies richness refers specifically to the ____
a. numbers of individuals of each species present. b. ability of larger animals to enrich themselves by successfully preying on smaller ones. c. number of different species in the habitat. d. feeding levels at which the animals are located. e. relative abundance of the species
The operation of a synapse
a. results from the passage of an electrical charge across the gap. b. involves a transmitter substance from vesicles in the presynaptic neuron that act upon receptor sites on the postsynaptic neuron. c. occurs only between two nerves. d. is limited only by the action of acetylcholinesterase. e. involves transduction of the electrochemical energy of an action potential into mechanical energy of movement.