Micro Organisms
The endosymbiosis hypothesis provides an explanation for how

eukaryotes developed from prokayotes
protozoa developed from algae
prokaryotes developed from eukaryotes
algae developed from protozoa

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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
oxygenic photosynthesis first evolved in eukaryotes
eukaryotes evolved from bacteria

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