Biology Amoeba Sisters: Ep 9
Biological Levels in Biology: The World Tour Whether Bacterium, Fungus, Protist, or Animal, if it’s alive it is made of one or more cells. Cells are the first level (the most basic living level). ⬇Cells can become tissue. ⬇Tissues make organs (although organs are not always made up of tissue). The heart is an organ.⬇Organ…