The process of caculating the absoulte age of a rock by measuring the amounts of parent and daughter materials in a rock and by knowing the half-life of the parent.

radiometric dating

Explanation:

By measuring the amounts of parent and daughter materials in a rock and by knowing the half-life of the parent, a geologist can calculate the absolute age of the rock. This method is called radiometric dating.

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explanation:

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

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explanation: