Which of the following is the primary fuel source for transportation?

a. nuclear energy
b. renewable energy
c. coal
d. natural gas


e. petroleum


ANSWER: e

Biology & Microbiology

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The source of energy for nearly all ecosystems is 

A. the sun. B. food. C. oxygen. D. water.

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Which of the following cellular processes is coupled with the hydrolysis of ATP?

A. Facilitated diffusion B. Active transport C. Chemiosmosis D. Osmosis E. Na+ influx into a nerve cell

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An individual with an SRY gene is a male mammal.

Answer the following statement true (T) or false (F)

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According to the above figure, which letter corresponds to the area where most, if not all, amino acids are reabsorbed?

A. A B. B C. C D. D E. E

Biology & Microbiology