Biology, 07.11.2019 19:31 bjbass899

Which of the following statements accurately explains how earth’s atmosphere supports life?
a. earth’s atmosphere contains 78 percent oxygen, which is essential for life.
b. earth’s atmosphere contains 21 percent oxygen, which many life forms need to
survive.
c. earth’s atmosphere contains more oxygen than carbon dioxide.
d. earth’s atmosphere contains carbon dioxide, which all life forms breathe in.

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Which of the following statements accurately explains how earth’s atmosphere supports life?
a...