Saltatory conduction is
A) the process of conduction leaping along myelinated neurons.
B) an action potential generated in taste receptors or buds.
C) the movement of neurotransmitters across a synaptic cleft.
D) the activation of the fight-or-flight response.
E) the movement of an electrical impulse from the dendrite to an axon.
A
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Death cap mushrooms produce a substance called alpha-amanitin. Alpha-amanitin efficiently blocks synthesis of mRNA, but not of tRNA or rRNA in eukaryotic organisms. This is possible because alpha-amanitin efficiently interferes with _____
A) the action of RNA polymerase I, but not RNA polymerase II or III B) RNA polymerase III, but not RNA polymerase I and II C) the action of one or more basic transcription factors D) the action of RNA polymerase II, but not RNA polymerase I or III
The measure of the reproductive success of a genotype is called Darwinian fitness
Indicate whether the statement is true or false
All plants have two multicellular phases, one diploid and one haploid, a phenomenon called ____
a. alternation of generations b. double fertilization c. polyploidy d. mitosis e. dysploidy
A eukaryotic chromosome consists of
a. DNA and lipids. b. RNA and proteins. c. DNA and proteins. d. DNA and carbohydrates. e. just DNA