The anatomical structure identified with the letter
“C” in the figure above is
a. the arterial wall.
b. the lumen.
c. atherosclerotic plaque.
d. the capillary wall.
e. none of these.
Answer: c
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The membranes of winter wheat are able to remain fluid when it is extremely cold by _____
A) increasing the percentage of unsaturated phospholipids in the membrane B) increasing the percentage of cholesterol molecules in the membrane C) decreasing the number of hydrophobic proteins in the membrane D) cotransport of glucose and hydrogen E) using active transport
One possible reason that there are not any really large insects currently living on Earth is that
A. gas exchange across their moist skin surfaces cannot support the metabolic needs of a large body. B. they do not have as many papulae as echinoderms. C. their gills do not have as many lamellae as fish gills. D. the bulk flow of air through their tracheal tubes would be more difficult the larger the body and longer the tracheal tubes. E. their lungs never evolved to be as highly branched as a mammal's. 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 respiration in insects? 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?
As an organism becomes ecologically extinct, predators must find new prey which allows new predators to fulfill vacated niches
Indicate whether the statement is true or false
Drugs like aziodothymidine (AZT) work against HIV infections by inhibiting
A. the cleaving of proteins needed to make the protein coat of a virus. B. host cells from reproducing. C. viral DNA from inserting into the host chromosome. D. viruses from entering a host cell. E. reverse transcriptase.