I'm not sure how exactly you wanted this question to be answered. You're either talking about the symmetry where animals would have two legs or two arms for example and thus producing a pair of each muscle on both sides of the body, or you're refering to the development of agonistic and antaonistic muscles where each of them served a different purpose; either extending or contracting.
<span>The answer to the following question would be, Antoine Lavoisier. </span>
Intertidal zone-Referred sometimes as foreshore,which is area above water at low tide and under water at high tide
A, every codon is specific to its amino acid