I think its B <span>DNA sequences that code for genetic instructions attach to phosphate groups that express an organism's physical traits. </span>
<span>Transversus abdominis is the abdominal muscle that can only compress the abdomen</span>
Answer:Amphibians evolved during the middle of the Devonian period (416 to 359 million years ago) from the lobe-finned fish of the vertebrate class Sarcopterygii. Species within the genus Ichthyostega (members of the Labyrinthodontia subclass) are considered by some scientists to be the earliest amphibians.
Explanation: