Answer:
Algae produced and still produces much of the world's oxygen supply, especially in the atmosphere.
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Explanation:
Answer:
Explanation:
You can't exactly tell what's going on in the picture if there is no context at all.
The most recent and arguably best-known, the Cretaceous–Paleogene extinction event, which occurred approximately 66 Ma (million years ago), was a large-scale mass extinction of animal and plant species in a geologically short period of time.
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Answer:
The fluoride is what helps you avoid cavities
Explanation:
water fluoridation as safe and effective in preventing tooth decay for both children and adults