Structures that are no longer needed but remain within the body are called
a. vestigial structures.
b. nonuseful structures.
c. ancient structures.
d. defunct structures.
e. retrostructures.
A
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The film of fluid in the pleural cavity functions to:
a. nourish the lungs. b. rehydrate the lungs. c. provide lubrication between the lungs and thoracic wall. d. trap bacteria that may enter the lungs. e. inflate the lungs.
Which of the following produces the most ATP when glucose (C6H12O6) is completely oxidized to carbon dioxide and water?
A) glycolysis B) fermentation C) oxidation of pyruvate to acetyl CoA D) citric acid cycle E) oxidative phosphorylation (chemiosmosis)
All multicellular organisms have:
A. organs and organ systems. B. specialized and differentiated cells. C. predators. D. mechanisms for cell-cell adhesion.
Members of the class Bivalvia:A
have gills that secrete the shell. B. have a mantle that may form pearls. C. are all sessile. D. all have a radula. E. have a broad foot used for locomotion.