What factors influence the input and output of carbon through Earth's spheres? The oceans on Earth act as carbon sinks. The combustion of fossil fuels contributions to an increase in atmospheric carbon dioxide. Animals are solely responsible for the release of carbon dioxide via respiration
Micro molecules all contain oxygen and hydrogen Cho Cho Chon c-carbon h-hydrogen o-oxygen cho cho chon is carbs fats proteins
Answer:3.5 billion years ago
Explanation:About 3.5 billion years ago, the first microscopic organisms appeared in the ocean. The first invertebrates developed in the oceans. They were soft-bodied animals with a shell or carapace, such as these trilobites.