Micro Organisms
Mycoplasmas are different from the other prokaryotes by

absence of cell wall itself
presence of chitin in cell walls
presence of murrain in cell walls
presence of proteins in cell walls

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

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

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

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