Something that is naturally contained within something else, and therefore always part of it defines the word .

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

Drag the tiles to the correct boxes to complete the pairs. match the nitrogenous base of dna with its complement.

Which locations on the map are low-pressure areas? a b c d e