What does the concept of neuronal plasticity imply?
A) that the nervous system is composed of a fixed and static group of structures
B) that the nervous system can be reorganized or remodeled
C) that the nervous system loses functionality as animals age
D) that the nervous system of humans is more advanced than those of other animals
Answer: B
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Intracytoplasmic membrane systems housing vesicles known as chromatophores, which function in photosynthesis, are commonly found in
A) algae. B) green sulfur bacteria. C) most autotrophic organisms. D) purple phototrophic bacteria.
The descending limb of the loop on Henle is impermeable to water.
a. true b. false
When would an atom be least likely to form chemical bonds with other atoms?
A) The number of protons equals the number of electrons. B) The number of protons equals the number of neutrons. C) There is only one electron in the valence shell. D) The valence shell is full of electrons.
An advantage of using reverse transcriptase to prepare a gene for cloning is that
A) reverse transcriptase is more efficient than RNA polymerase. B) the resulting DNA strand will lack exons. C) reverse transcriptase is more efficient than DNA polymerase. D) the resulting DNA strand will lack introns.