Question

louis pasteur determined that microbes only appeared in sterile broth if the broth was exposed to the air. he concluded that the microbes were found. findings contributed to which part of the cell theory?
o all animals are made of cells.
o all cells come from preexisting cells.
o the cell is the basic functional unit in living things.
o unicellular organisms inherit an exact copy of dna from the parent cell.

Explanation:

Louis Pasteur's experiment showed that microbes didn't spontaneously generate in sterile broth but came from the air, supporting that cells come from pre - existing cells. His findings countered the idea of spontaneous generation and reinforced the concept that new cells arise from existing ones in the environment.

Answer:

All cells come from preexisting cells.