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Without this symbiotic relationship in cellular life on other planets, would it prevent complex cellular life?

• Retric 2y ago
  No, there’s multiple options. Our biology is based on endless optimization of one of them not the only possibility.
  • pantalaimon 2y ago
    All life we know of originates from one type of single-cellular life, the last universal common ancestor (LUCA) https://en.wikipedia.org/wiki/Last_universal_common_ancestor https://en.wikipedia.org/wiki/Last_universal_common_ancestor
    • Retric 2y ago
      Which is unsurprising as any original self replicating organisms that showed up significantly later would be at a massive disadvantage, and early competition had billions of years to find a winner. It’s worth remembering that evolution can end get stuck in suboptimal solutions because they still beat 99.999…% of the possibilities. Our blindspot is an issue but it showed up early enough that there’s been vast amounts of optimization based around that initial slightly sub optional feature.
      • yieldcrv 2y ago
        Exhibit b. Getting cancer, or specifically short telomeres, is a suboptimal evolutionary outcome that other some other mammals don’t have But because the issue appears after we reproduce, it passes on