Phylogeny is the apparent
(a) name of an organism.
(b) ancestry of an organism.
(c) nomenclature.
(d) dichotomy of a system of classification.
(a) name of an organism.
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In a classic experiment, Otto Loewi stimulated the vagus nerve of a frog heart electrically. He let the fluid bathing the heart he was stimulating flow to and thus contact a second, nonstimulated heart. Both the first and second hearts slowed down with this stimulation. Based on this response, you can assume the nerve he stimulated was part of the
A. parasympathetic system. B. sympathetic system. C. somatic system. D. atrioventricular system. E. central nervous system.
At the breakfast table, your roommate says, "Oops! I forgot to take my melatonin last night. I'd better take it now." How do you respond?
A. "Good idea -- you don't want your bones to get brittle." B. "Be sure not to take too much, or your blood sugar could get dangerously low." C. "Don't take it now - it regulates biological rhythms, and is normally high at night and low during the day." D. "Don't take it after a meal - it promotes the 'fight-or-flight' response, not 'rest-and-digest'." 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 melatonin? 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?
The movement of wind and water can remove soil from an area, a process called ____________.
Fill in the blank(s) with the appropriate word(s).
When plaque becomes mineralized with calcium and phosphate crystals, it becomes a hard, porous substance called ________.
Fill in the blank(s) with the appropriate word(s).