Some insects can stride on the surface of water because water
a. has a high specific heat.
b. has lower density when frozen.
c. is a good solvent.
d. has surface tension.
e. resists temperature changes.
Answer: d. has surface tension.
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The discovery that ATP is a pain-signaling factor immediately suggested what possible therapeutic approach to alleviate chronic pain?
A. create large intracellular aggregates of ATP B. treat with an ATP receptor antagonist C. block the synthesis of ATP inside cells D. use electric stimulation on pain centers of the brain 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 pain? 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?
Four of the five structures listed below are parts of
the same unit. Select the exception. a. distal tubule b. loop of Henle c. ureter d. proximal tubule e. Bowman’s capsule
Of the following hominin species, which appears first in the fossil record?
A. Australopithecus afarensis D. Australopithecus garhi B. Australopithecus africanus E. Paranthropus aethiopicus C. Australopithecus anamensis
The symmetry of echinoderms generally includes
A) radially symmetrical larvae and adults. B) bilaterally symmetrical larvae and adults. C) bilaterally symmetrical larvae and radially symmetrical adults. D) radially symmetrical larvae and bilaterally symmetrical adults.