Assertion: dinoflagellate's plastid | /r/CapableOf | take over important cellular functions
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text: This suggests that all free-living dinoflagellates are metabolically dependent on plastids that have taken over important cellular functions, apparently early in the evolution of the group; plastidial tetrapyrrole biosynthesis may also explain the existence of bioluminescent luciferin in nonpigmented dinoflagellates.