Which process is responsible for the release of neurotransmitters from the presynaptic neuron into the synapse?
a. diffusion
b. endocytosis
c. exocytosis
d. fusion
e. synaptic release
ANSWER: c
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What would result if an error inside gastrulation caused too few cells inside the archenteron?
A. Too little endoderm, resulting in missing gut and organs B. Too little ectoderm, resulting in missing nervous system or skin C. Problems in muscle development D. Too little protoderm, resulting in missing organs Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about the fate of the archenteron? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
What is the basis for the difference in how the leading and lagging strands of DNA molecules are synthesized?
A. DNA polymerase can join new nucleotides only to the 3?3? end of a preexisting strand, and the strands are antiparallel. B. The origins of replication occur only at the 5?5? end. C. DNA ligase works only in the 3?3? ?? 5?5? direction. D. Helicases and single-strand binding proteins work at the 5?5? end.
The area where fresh water and seawater mix is called a(n)
A) estuary. B) benthic realm. C) aphotic zone. D) continental shelf.
The movement of continents over time is referred to as _______
What will be an ideal response?