Final answer:
Decreasing photosynthetic organisms would lead to less oxygen and more carbon dioxide in the atmosphere.
Explanation:
If the number of photosynthetic organisms on Earth decreased drastically, it would lead to:
- Less oxygen gas would be found in Earth's atmosphere as photosynthetic organisms are primary oxygen producers.
- More carbon dioxide gas would be found in Earth's atmosphere as there would be a reduced number of organisms to utilize it for photosynthesis.
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