Micro Organisms
The membranes of which domains are chemically the most similar?

Archaea and Bacteria
Bacteria and Eukarya
membranes of all three domains are chemically identical
Eukarya and Archaea

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

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

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