Are reproductive and excretory systems inherently linked? Could life evolve differently?

This is seen in all vertebrates and arthropods, as the anus and reproductive organs are derived from the same region. In cnidarians, where the mouth and anus are the same orifice, gametes are released from inside this blind gut. Only in planarians is the gonopore separate from the anus (which is also the mouth).

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Are reproductive and excretory systems inherently linked? Could life evolve differently?

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