Micro Organisms
The idea of selective toxicity was first proposed by

Paul Ehrlich
Antony van Leeuwenhoek
Louis Pasteur
Alexander Fleming

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Micro Organisms
Eukaryotic cell organelles first emerged

when bacteria made their first attempts at reproduction
just before the origin of the animal and fungal kingdoms
when prokaryotes engulfed each other and became interdependent
from a specialized lineage of cells within the kingdom Protista

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