Answer:
The fossils that provide information on the formation of an oxygen-rich atmosphere are the stromatilites from the Precambrian era. These are layered and columnar fossils consisting mainly of cyanobacteria which were the original life form back then. These bacteria took in carbon dioxide and produced oxygen by photosynthesis as early as 2.5 billion years ago (the earth is about 4.5 billion yrs old).
Explanation:
Answer:
idk read that what they all say
Explanation:
idk
There are usually 2-10.4 would be the best answer.
Answer:
Explanation below
Explanation:
DNA is the one responsible for character or trait transfer because it contains genes.
There are genes for sperm and these sperms are for reproduction.
The answer to your question is D
