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Home Q & A Board Science-Related Homework Help Physics Astronomy
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Tbreland05 Tbreland05
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5 years ago
Nearly all of the oxygen in the Earth's atmosphere was originally produced by photosynthesis in the leaves of trees that covered the continents 3.5 billion years ago.
A) True
B) False
Textbook 
The Essential Cosmic Perspective

The Essential Cosmic Perspective


Edition: 7th
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tray5tray5
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5 years ago
Brilliant ツ
kiara23247843
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This helped my grade so much Perfect
kiara23247843
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This calls for a celebration Person Raising Both Hands in Celebration
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