The linea alba is the band of connective tissue that separates the rectus abdominis.
Two things required are water(H2O), carbon dioxide (CO2), and chlorophyll
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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.
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