If the cells stop dividing and do not spread, the tumor is benign
Answer:
The fish did not yet exist when the old layers of rocks were deposited. In fact, animals with hard parts did not evolve until about 600 million years ago, which is only about 13% of the 4.5 billion year age of the Earth. Multicellular animals without hard parts left tracks in older sediments, but had no fossilize-able body parts.
Explanation:
I think its matter
hope that helps
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Answer:
Bacteria that entered an organism body can cause mutations by altering the gene
