A third-degree burn is the most serious type of burn, as it involves all layers of skin and can severely damage muscle and tissue. Skin grafting is necessary to provide a protective layer for the burned area so that it is able to heal. It acts as a protective barrier so that bacteria isn't able to infect the burned portion of skin and reduces the course of treatment needed.
The cell cycle is divided in two main events : interphase and mitosis. However, those two phases have further sub-divisions.
When a beetle is born, the mother's and fathers genes assemble to create something new, those "genes" are "tested" to see if they will allow the beetle to live. If the beetle lives, they can reproduce, if they reproduce, those survival traits are passed down to their children.