Which of the following is not a member of
Osteichthyes?
a. teleosts
b. ray-finned fish
c. lungfish
d. stingrays
e. lobe-finned fishes
Answer: d
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Ciprofloxacin is a widely used antibiotic. This molecule is used to target:
A. topoisomerases in cancer cells. B. topoisomerases in fungal cells. C. topoisomerases in bacterial cells. D. structural maintenance proteins (SMC) in bacterial cells. E. structural maintenance proteins (SMC) in eukaryotic cells.
You treat an organism with a drug that inhibits calcium permeability in nerve cells specifically. As a result, you expect to see
A) no depolarization of membranes. B) no repolarization of membranes. C) failure to achieve the threshold necessary to stimulate a signal. D) presynaptic neurotransmitter release. E) no postsynaptic receptors.
Where are the cell bodies of most motor neurons located?
a. in the ganglia alongside the spinal cord b. in the spinal cord c. in the brain d. in the brain stem e. in the cerebellum
A parrot fluffs out her feathers and screeches when another female bird approaches. She is
Select one: a. communicating using only visual signals. b. sick. c. communicating using only auditory signals. d. communicating using visual signals and auditory signals. e. communicating using tactile cues.