Why is it difficult for scientists to accurately reconstruct the history of life on Earth during Precambrian time? (check all that apply) Many of the fossils have been destroyed
Most life was simple and didn’t fossilize well
We can’t dig deep enough
Life didn’t exist back then

Explanation:

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The second one most life was simple and didn't fozzilize

image result for describe the various types of gene mutationsghr.nlm.nih.gov

the types of mutations include: missense mutation: this type of mutation is a change in one dna base pair that results in the substitution of one amino acid for another in the protein made by a gene. nonsense mutation: a nonsense mutation is also a change in one dna base pair.

explanation: