Are prokaryotes alive?

Prokaryotes are alive and well. They still live in the more extreme and/or adverse temperatures. Prokaryotes are living microscopic systems that can reside in any other living system. E.coli is one good example that can reside in humans. read more

Prokaryotic cells are simple in structure, with no recognizable organelles. They have an outer cell wall that gives them shape. Just under the rigid cell wall is the more fluid cell membrane. The cytoplasm enclosed within the cell membrane does not exhibit much structure when viewed by electron microscopy. read more