Question

multiple choice question
what is our current understanding of the phylogeny of organisms that possess chloroplasts?
all chloroplasts likely evolved from a single line of cyanobacteria, therefore photosynthetic eukaryotes are monophyletic.
chloroplasts likely evolved from several lines of cyanobacteria; therefore, photosynthetic eukaryotes are not monophyletic.
all chloroplasts likely evolved from a single line of cyanobacteria, however, photosynthetic eukaryotes are not monophyletic.
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Explanation:

Chloroplasts are thought to have originated from a single - line of cyanobacteria through endosymbiosis. However, the group of photosynthetic eukaryotes is not monophyletic as different lineages have acquired chloroplasts in different ways or have lost them over time.

Answer:

All chloroplasts likely evolved from a single line of cyanobacteria, however, photosynthetic eukaryotes are not monophyletic.