literally means "the very first". Eukaryotes. This is a catch all term for animal-like, fungi-like, and plant-like mostly single-celled organisms.
mushrooms, molds, yeast
kingdom with the most species
examples include sponges, jellyfish, birds, fish, mammals, insects
can be found anywhere, but can live in harsh conditions like boiling mud pots and the ocean floor
"true" this kingdom of organism is found in every habitat on earth
includes vascular (trees, flowers) and nonvascular (mosses, ferns)