Answer:
The atomic number or proton number of a chemical element is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element. It is identical to the charge number of the nucleus.
Explanation:
The substrate is the part that sticks into the active site of an enzyme.
What are you trying to find? That is a pedigree
ANSWER:
Index Fossils can be used to identify a specific period of time
