what is An aerial view of land that is used to study the effects of weathering, erosion, and deposition?

How many copies of each chromosomes should be present in each of the 4 final haploid versions of gamete?

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Hurry which of these is true about index fossils? a) are very scarcely found b) used as guides in relative dating c) found in the youngest layer of the rock d) used as reference points in absolute dating