Diffusion of calcium into the synaptic knob of a presynaptic neuron generates which immediate response?
Deactivation of neurotransmitters by enzymes in the synaptic cleft
Absorption of neurotransmitters by the postsynaptic neuron
Repolarization of the postsynaptic neuron
Fusion of synaptic vesicles with the neuron’s plasma membrane and release of neurotransmitter
D. Fusion of synaptic vesicles with the neuron’s plasma membrane and release of neurotransmitter
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Thick-skinned rhinoceroses and elephants were once classified together as pachyderms. They actually descended from different ancestors that in turn evolved from a thin-skinned common ancestor that was not included in the pachyderms. Pachyderms were therefore, as a taxon,
A. polyphyletic. B. polygenetic. C. paraphyletic. D. a supergroup. E. a kingdom.
If looking to discover a new organelle, which are located inside the cell, what kind of microscope must be used?
a. brightfield microscope b. transmission electron microscope c. scanning electron microscope d. compound light microscope.
Burning fossil fuels releases carbon dioxide into the atmosphere. This additional carbon dioxide is causing a phenomenon called global warming. Which process "put" the carbon into our fossil fuels? Explain the process
What will be an ideal response?
What is the basic problem with cloning adult animals?
a. obtaining enough DNA b. finding proper surrogates to carry the cloned embryos c. reprogramming the DNA d. obtaining DNA without mutations e. autoimmune rejection of the embryo by the surrogate