The symbol na+ represents a sodium atom that has lost an electron.
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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.

When lactate builds up in a runners muscles it causes a burning sensation what causes this to occur

What is a dendrite and what does it do?