この問題が分からないです

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Animals cells do not have cell wall or chloroplasts, whereas plant cells have cell walls and chloroplasts. Fungal cells are somewhere in between;they have cell walls but lack chloroplasts.Are fungal cells more likely to be animal cells that gained the ability to make cell walls, or plant cells that lost their chloroplasts? this question represented a difficult issue for early investigators who sought to assign evolutionary relationship based solely on cell chloroplasts and morphology. How do you suppose that this question was eventually decided?

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キミオモシロイネ
歴史は知らんがんなもんmtDNA系統樹で一発やん
代謝のpathwayも違うしcytoskeltonだって幾分見え方が違う。

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細菌類の代謝経路や細胞骨格の見え方が違うというのは、動物、植物のいずれでもないということなのでしょうか？つまり細菌を、動物か植物どちらに近いかという問い自体が不毛だということなのでしょうか？

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