Question

what kind of bacteria most likely gave rise to the chloroplast in the eukaryotic cells of plants and some algae​

Answer 1

Answer:

Yes§, this is part of the evidence supporting the theory that these (and possible some other organelles) arose through endosymbiosis (aka symbiogenesis). The group of bacteria from which mitochondria seem to have evolved are the Alphaproteobacteria. Chloroplasts appear most closely related to the cyanobacteria.

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Answer 2

what kind of bacteria most likely gave rise to the chloroplast in the eukaryotic cells of plants and some algae