In a word, "evolution" means
A) nature. B) selection. C) change. D) improvement.
C
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Sharks and rays deal with the osmotic stress of living in seawater mainly by ____
a. active transport of ions into the body through the gills b. excreting nitrogenous wastes through their kidneys as urea
c. active transport of ions out of the body by chloride cells d. excreting excess salt through the actions of specialized salt glands in their heads e. maintaining high levels of urea and trimethylamine oxide in body fluids
Bacteria that naturally exhibit bioluminescence have been found in which of the following genera?
A. Pasteurella B. Pseudomonas C. Vibrio D. Shigella
A visitor to an American tropical forest will probably never get to see a jaguar, the largest native cat species in the Americas, but will see many plant-eating monkeys. Use your knowledge of energy pyramids to explain the rarity of the predatory cats
What will be an ideal response?
Organisms that directly reduce almost all of their pyruvate to lactate are called ________ fermenters.
Fill in the blank(s) with the appropriate word(s).