what factors do scientist need to consider when determining whether a species is a new species or part of an existing species?

the answer u all are looking for is 4000000000000000000000 million years.

haha

it's made from mineral oil

answer; synapse; i believe this is correct,plz check first good luck;

1. law of superposition: when there are horizontal layers of rock. the layers at the top are the youngest.

2. law of uncomformity: where one layer is much younger than the previous one, therefore creating a gap in the time record.

3. inclusion: when there is a solid stone inside of another.

4. intrusion: a feature formed when a stone is filled with magma.

hope i answered your question.