Assertion: dinoflagellate's chloroplast | /r/DistinctFrom | normal one
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Source sentences:
text: Because dinoflagellate chloroplasts are unusually contained by three membranes, as opposed to a normal one or two, it is believed that they likely have evolved a tertiary endosymbiosis with a plasmid that contains the additional photosynthetic pigment complex of peridinin (Morden and Sherwood 2002).