The early Earth reducing atmosphere is thought to have lacked which of the following gases?

A. H2O
B. O2
C. SO4
D. CO2
E. N2


Answer: B

Biology & Microbiology

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Which are reasons for the Cambrian Explosion? Check all that apply.

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An endergonic reaction can proceed only if it absorbs:a

randomly available free energy. b. less free energy than is released by a coupled exergonic reaction. c. more free energy than is released by a coupled exergonic reaction. d. less free energy than is released by a coupled endergonic reaction. e. the same amount of free energy that is absorbed by the enzymatic breakdown of proteins.

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How can DNA tell you how closely related two organisms are?

What will be an ideal response?

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Pasteur's research on anthrax and rabies contributed to the development of the field of epidemiology/immunology/etiology)

What will be an ideal response?

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