The goal of polymerase chain reaction (PCR) is to determine the sequence of nucleotides in a stretch of DNA
Indicate whether the statement is true or false
FALSE
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Which of the following offers the best description of neural transmission across nearly all mammalian synaptic clefts?
A. Neural impulses involve the flow of K+ and Na+ across the cleft. B. Neural impulses travel across the gap as electrical currents. C. Neural impulses cause the release of chemicals that diffuse across the cleft. D. Neural impulses travel across the cleft in both directions. E. The calcium within the axons and dendrites of nerves adjacent to a synapse acts as the neurotransmitter.
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 will be an ideal response?
Four of the five answers listed below are
characteristics of xylem. Select the EXCEPTION.
a. dead at maturity b. cell walls are impregnated with lignin c. conducts dissolved sugars d. includes tracheids and vessels e. has pits in the walls of the cells
Investigations into the genetics of obesity have revealed that _____
1.in humans, obesity is believed to be controlled by a single gene interacting with the environment 2.obesity is an autosomal dominant trait 3.humans and mice both have a gene for leptin, which is thought to regulate energy storage 4.mutations probably account for the explosive increase in obesity in developed countries