Creatine phosphate functions in the muscle cell by

promoting the rapid resynthesis of ATP, by the action of creatine kinase.

Explanation:

Adenosine triphosphate (ATP) is the main form of chemical energy, its hydrolysis remaining highly exergonic. The maintenance of cellular homeostasis mechanisms, that adjust the generation processes of ATP, responds to the energy demand.

Creatine phosphate (CrP) was discovered in 1927 in the muscle tissue. Free creatine (Cr) is generated from the breakage of (CrP) during muscle contraction. Since the PCr / CK (Creatine kinase) system has a high rate of ATP generation, it is particularly important in situations of high metabolic demand, such as high-intensity physical exercise, when the ATP utilization rate exceeds its generation capacity by other metabolic pathways.

the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.