Which organelle is most likely to be found in both archaea and bacteria and why? both require chloroplasts for photosynthesis.
both have mitochondria to provide energy for the cell.
both need a nucleus in which to store their dna.
both use ribosomes to synthesize proteins.

Which organelle is most likely to be found in both Archaea and Bacteria and why?

Answer : Both use ribosomes to synthesize proteins.

Explanation : The ribosomes of bacteria and archaea are found floating in the cytoplasm, and in both cases their main function is the synthesis of proteins.

Hope this helps!

correct on flvs, its "Both use ribosomes to synthesize proteins"