Ask Question
Today, 09:47

Scientists infer that oxygen in Earth's atmosphere

did not exist in large quantities until after

(1) the first multicellular, soft-bodied marine

organisms appeared on Earth

(2) the initial opening of the Atlantic Ocean

(3) the first sexually reproducing organisms

appeared on Earth

(4) photosynthetic cyanobacteria evolved in

Earth's oceans

+3
Answers (1)
  1. Today, 09:54
    0
    Photosynthesis is the process of converting carbon dioxide into oxygen. Oxygen didn't really exist in the atmosphere until photosynthetic organisms appeared and evolved.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “Scientists infer that oxygen in Earth's atmosphere did not exist in large quantities until after (1) the first multicellular, soft-bodied ...” in 📗 Geography if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers