SAT Subject Biology Practice Question 42: Answer and Explanation

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Question: 42

1. In the Oparin-Haldane experiment, the artificial atmosphere they created contained which of the following?

I. Hydrogen gas

II. Oxygen gas

III. Reducing gases

A. I only
B. II only
C. I and II
D. I and III
E. II and III

Correct Answer: D


Oparin and Haldane's artificial atmosphere contained hydrogen gas and other reducing gases. It did not contain oxygen gas, which characterizes the current oxidizing atmosphere.

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