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these are the oldest forms of life on earth and are believed to have first appeared around 3.8 billion years ago
A. Archaeans
B. Bacteria
C. Fungi
D. None of the above​​


Sagot :

Answer:

B. bacteria or organism

Explanation:

organisms (microbes) that left signals of their presence in rocks about 3.7 billion years old.

b

The earliest life forms we know of were microscopic organisms (microbes) that left signals of their presence in rocks about 3.8 billion years old. The signals consisted of a type of carbon molecule that is produced by living thing