How many amino acids are considered to be essential
because the human body cannot synthesize them?
a. 2
b. 5
c. 8
d. 10
e. 12
Answer: c
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Why is gel electrophoresis so important when studying genetic variation?
A. Gel electrophoresis enables a scientist to identify dominant and recessive traits. B. Gel electrophoresis enables scientists to identify proteins of different size or charge. C. Gel electrophoresis enables scientists to replicate a strand of DNA. D. Gel electrophoresis enables a scientist to link phenotype to genotype. E. Gel electrophoresis enables a scientist to sequence DNA.
If you were analyzing tree rings, how might you distinguish between fires that occurred in the spring versus fires that occurred in the summer (assuming the fires left fire scars)?
What will be an ideal response?What information would best help you distinguish what type of sensation a sensory neuron transmits?
A. the rate of action potential firing B. the proteins it expresses most abundantly C. the part of the brain it transmits signals to D. the amplitude of action potentials E. the diameter of the axon 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 sensory neurons? 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?
One example of a simple reflex arc involves the
a. contraction of a muscle when it is stretched. b. conscious message to move part of the body. c. receptor, the brain, and the effector. d. muscle action in a salute when a noncommissioned combatant sees an officer. e. contraction of an antagonistic muscle when its opposite muscle relaxes.