Cndaria belongs to which class

Multicellular organisms use cell division, mitosis, for growth and the maintenance and repair of cells and tissues. single-celled organisms may use cell division as their method of reproduction. regardless of the reason for mitosis, the process ensures genetic continuity. what is the step in the cell cycle that ensure genetic continuity?

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes

In general, are there any major differences that you can see? explain