Animals tend to feed on prey that maximize their net energy intake. This is called the ________ theory.
A. maximal consumption
B. competitive exclusion
C. optimal foraging
D. optimization
Answer: C
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The function of a single fruit fly gene was inactivated completely by mutation. A fruit fly with this mutation did not have legs. Which is a reasonable conclusion to make based on this information?
A) The normal gene function is required for viability in fruit flies. B) The normal gene function is required for leg formation in fruit flies. C) The normal gene is unlikely to regulate other genes involved in leg formation. D) The normal gene is likely required in fruit flies for formation of legs, wings, and antenna.
Which of the following organism is described
by chitin cell walls, spore production, extracellular digestion?
a. water molds b. dinoflagellates c. yeast d. red algae e. ferns
Which of the following is a vitamin-deficiency disease?
A. scurvy B. Lyme disease C. rabies D. kwashiorkor
Cardiac output is the product of heart rate times stroke volume.
a. true b. false