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Yoshi Yoshi
wrote...
Posts: 4092
9 years ago
One of the reasons that free oxygen in our atmosphere is important to the development and maintenance of life on Earth is because oxygen:
A) combines with iron in volcanic rocks.
B) can form ozone and block some UV radiation.
C) is necessary for photosynthesis to occur.
D) reduces atmospheric temperature.
E) was very abundant in Earth's early atmosphere.
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wrote...
9 years ago
B
Yoshi Author
wrote...
9 years ago
Muchas gracias!

Appreciate your help tremendously Smiling Face with Open Mouth
wrote...
9 years ago
Smiling Face with Open Mouth Great!
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