Command of Evidence: Quantitative

SAT Reading and Writing· difficulty 3/5

A biologist measured oxygen consumption (mL/min) of four fish species at rest: Species I, 18; Species II, 24; Species III, 35; Species IV, 67. The biologist concluded that Species IV has substantially higher metabolic demand than the others. The strongest support is ______

Which choice most logically completes the text using the data above?

A
$Species I's consumption of 18 mL/min.$
B
$Species II's consumption of 24 mL/min.$
C
$the average across species.$
D
$Species IV's 67 mL/min, nearly 2x the next highest and over 3x the lowest.$
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Explanation

"Substantially higher metabolic demand" is supported by IV's 2x and 3x ratios versus other species. Choice B is correct.

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