When a skeletal muscle fiber is at rest, its ATP demands are met by ADP and creatine phosphate. In a resting muscle, excess ATP transfers its energy to creatine, producing ADP and creatine phosphate. This acts an energy reserve that can be used to quickly create more ATP. When the muscle starts to contract and needs energy, creatine phosphate transfers its phosphate back to ADP to form ATP and creatine.
Cells. The rule of life is that everything is made up of one ore more cells. If they are made of multiple cells they may be colonial or multicellular.
Answer:Cells
Answer:
competitive exclusion principle
Explanation:
states that two species that compete for the exact same resources cannot stably coexist.