The centrosome is what organizes the spindle fibers.
Answer:
ATP. Adenosine 5'-triphosphate, or ATP, is the principal molecule for storing and transferring energy in cells. ... When one phosphate group is removed by breaking a phosphoanhydride bond in a process called hydrolysis, energy is released, and ATP is converted to adenosine diphosphate (ADP).
Erythrocyte is an example of a specialized cell
So that all animals can be classified and accounted for. This is also used in dichotomy analysis in order to find out the species of an invasive plant or animal