I need the ages from youngest to oldest and what rocks have erosion.
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What is an animal that lives by preying on other animals

How does the molecular clock work? a. it analyzes the brain functionality of two different species.b. it examines and compares the physical characteristics of two different species.c. it illustrates relationships between two different species.d. it compares the number of mutations that exist in the dna of two different species.

How does the nervous system affect the excretory system?