Final answer:
During the Precambrian era, Earth had a significantly higher level of carbon dioxide in its atmosphere compared to modern Earth due to the prevalent gases like ammonia, methane, water vapor, and nitrogen, with very little oxygen present.
Explanation:
Precambrian Earth's atmosphere and oceans were much richer in carbon dioxide compared to modern Earth because it was so prevalent in the atmosphere, along with other gases like ammonia, methane, water vapor, and nitrogen. The early atmosphere lacked oxygen and only contained trace amounts of it, creating conditions very different from present-day Earth.
Learn more about Precambrian Earth's atmosphere and oceans here:
https://brainly.com/question/38563768
