Bony fishes possess two features not found in other fish. Select the best choice from those listed below to complete the following sentence. Bony fishes have
A. swim bladders and gill covers called opercula.
B. swim bladders and a closed circulatory system.
C. swim bladders and a complete digestive system.
D. swim bladders and movable jaws.
Answer: A
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The supersecondary structure (motif) most likely to contain a heptad (or leucine) repeat would be:
A. a Greek key. B. a ?-?-?. C. a helix-turn-helix. D. a coiled-coil. E. a four-helix bundle.
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?
Which statement is true about the structure of DNA?
A) It is a polymer made up of a string of amino acids. B) Each different sequence folds into a different three-dimensional shape. C) The two strands of a DNA molecule are held together by base pairing. D) It contains nitrogenous bases known as A, C, G, and U.
Why do diseases involving widespread infection often result in a fever?
A) The inflammatory and immune responses result in extra heat production. B) The microorganisms trick the brain's temperature control center into creating a hot environment that favors their growth. C) The brain's temperature control center responds to inflammation by creating a hot environment unfavorable to the growth of microorganisms. D) The inflammatory response result is less heat production.