Approximately what percentage of the total caloric content of food is the human body able to extract?

A) 10 to 30%
B) 40 to 60%
C) 50-70%
D) 70-90%


B

Environmental & Atmospheric Sciences

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The oldest known vertebrates; a group of “bony-skinned” fish characterized by bony armor but

no jaws or teeth:a. labyrinthodonts d. ostracoderms b. therapsids e. placoderms c. gymnosperms

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The Panthalassa Ocean eventually became the present-day _________ Ocean

a. Atlantic c. Arctic b. Indian

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Which of the following stimulates the enzyme isocitrate dehydrogenase?

A) ATP and NADH + H+ B) ADP and NAD+ C) acetyl CoA D) none of these

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The early Earth was not hospitable to life as we know it because of meteorite bombardment, an oxygen-poor atmosphere, and the molten state of the planet for the first few million years

Indicate whether this statement is true or false.

Environmental & Atmospheric Sciences