Approximately how long ago do we find the first fossils for the first multi-celled organisms? A. 175 million years ago B. 1500 million years ago C. 10,000 years ago D. 4500 million years ago

D. 4500 million years ago

Explanation:

Bacteria is known as one of the oldest life forms which were present on the earth. They were believed to be found in water bodies according to the fossil records found by scientists.

A type of bacteria called Cyanobacteria were the oldest multi celled organisms fossils found by scientists. The fossils found were believed to be around 4.5 billion years ago which is the same as 4,500 million years ago. It is also believed life forms existed before this time.

c.) biotic: snails; abiotic: temperature climate

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