Answer:
Radiometric dating for the analysis of isotopes in the fossil.
Explanation:
Radiometric dating can be used to determine the precise age of a fossil by measuring isotoped decay within tge fossil or the surrounding rock in contact with it.
Fossil evidence, and biographical evidence.
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Answer: Cells have different shapes because they do different things. Each cell type has its own role to play in helping our bodies to work properly. Their shapes help them carry out these roles effectively.
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Units that determine traits ?