Micro Organisms
Which of the following sequences has helped in identifying eukaryotes, eubacteria and archeabacterial cell types?

Signal sequence
Signature sequence
Amino acid sequence
Shine-Dalgarno sequence

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

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

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