Which of the following events cannot be predicted by calendars based on the movements of celestial
objects?
a. spring rains
b. migration of animals
c. floods
d. volcanic eruptions
e. solar eclipses

Cell division is important to single celled organisms because it allows the cells to reproduce. through cell division, cells make exact copies of themselves. when single celled organisms go through cell division, they make exact copies of themselves which is how they reproduce.