Cells are the basic units of life. The largest known animal is the blue whale. Prokaryotes are cells that have a nucleus. All cells have a cell membrane.
All cells have a cell wall.
Ribosomes are the sites of protein synthesis in cells. Storage areas within a cell are know as lysosomes. Chromosomal DNA is duplicated and divided into two identical sets during mitosis. Mitosis occurs only in gametes. Cellular respiration releases chemical energy for cellular use.