Micro Organisms
The idea of selective toxicity was first proposed by

Alexander Fleming
Antony van Leeuwenhoek
Paul Ehrlich
Louis Pasteur

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Micro Organisms
Archeal cells usually do not contain peptidoglycan, rather contain pseudo-peptidoglycan which is mainly composed of

N-acetyltalosaminuronic acid and D-amino acids
N-acetyltalosaminuronic acid and L-amino acids
N-acetylmuramic acid and D-amino acids
N-acetylmuramic acid and L-amino acids

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Micro Organisms
Genetic and biochemical similarities between contemporary cyanobacteria and eukaryotic chloroplasts are accepted to mean that

eukaryotes evolved from bacteria
oxygenic photosynthesis first evolved in eukaryotes
eukaryotes evolved from archaea
cyanobacteria arose from chloroplasts which escaped from plant cells

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