Micro Organisms
The idea of selective toxicity was first proposed by

Antony van Leeuwenhoek
Alexander Fleming
Paul Ehrlich
Louis Pasteur

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Micro Organisms
Which of the following best represents the hierarchy of levels of biological classification?

Kingdom, phylum, class, order, family, genus, species
Class, order, kingdom, phylum, family, genus, species
Phylum, kingdom, class, order, genus, species, family
Kingdom, phylum, family, class, order, genus, species

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