Prokaryotes are unicellular organisms that lack organelles or other internal membrane-bound structures

Eukaryotic cells are cells that contain a nucleus and organelles, and are enclosed by a plasma membrane.

a type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores.

a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.

the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.