Respuesta :
Answer: Single cell organisms absorbed harmful gases from the air when they first formed
Explanation:
Answer: Single-celled organisms released oxygen into the air when they photosynthesized.
Explanation:
I got 100% on the test
Answer: Single cell organisms absorbed harmful gases from the air when they first formed
Explanation:
Answer: Single-celled organisms released oxygen into the air when they photosynthesized.
Explanation:
I got 100% on the test