Saltatory conduction is a term applied to the "jumping" movement of action potentials
A. from one neuron to another.
B. along the postsynaptic membrane from dendrite to axon hillock.
C. along myelinated axons.
D. across electrical synapses.
E. in two directions at the same time.
Answer: C
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If she moves the operator to the far end of the operon, past the transacetylase (lacA) gene, which of the following would likely occur when the cell is exposed to lactose?
A) The inducer will no longer bind to the repressor. B) The repressor will no longer bind to the operator. C) The operon will never be transcribed. D) The structural genes will be transcribed continuously. E) The repressor protein will no longer be produced.
In mammalian eyes, light must pass through neural cells to reach the photoreceptors in the retina
Indicate whether the statement is true or false.
Terrestrial vertebrate richness is most strongly tied to
A) primary productivity. B) potential evapotranspiration. C) sea surface temperatures. D) altitude.
The conversion of nitrate (NO3-) to nitrogen gas (N2) is called
A. photosynthesis. B. denitrification. C. nitrification. D. ammonification. E. nitrogen fixation.