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Blood has traveled from the heart to the toes. which describes the next step of the circulation process?

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

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?