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Also for answer choice B: if something is being engulfed, wouldn't it follow that their entire being, including all of its genetic material, would be inside whatever engulfed it? Where else could it possibly be?

Confused about how we went from "the nucleomorph experienced endosymbiosis" to "this nucleomorph was found in a plant" to "this plant emerged as a consequence of endosymbiosis." How do we know that the plant emerged as a direct consequence of endosymbiosis? Couldn't it be possible that it emerged under different circumstances and it just happens to have a nucleomorph that underwent endosymbiosis inside it?

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