last line of defense is the first part.
and the defense is part of her system immunity. this makes sense since the immune system is used to guard against viruses and diseases
Conservation of mass states that "Mass cannot be created or destroyed". In all reactions of a closed system, mass is always conserved. So yes, the mass is conserved in this example
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: