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

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

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

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

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

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