3 ms·

multicellular life

• gus_massa 7y ago
  Multicellular life is easy, it has evolved independently more than 25 time on Earth https://en.wikipedia.org/wiki/Multicellular_organism https://en.wikipedia.org/wiki/Multicellular_organism I think that the step from Prokaryote to Eukaryote is much more difficult. (Feel free to disagree. Nobody is sure.) [Assuming there was an ocean in Mars, and assuming there was life.] The problem is that the ocean disappeared, probably due to geological reasons that neither a unicelular or multicelular lifeform can solve. Sometimes you are just born in the wrong planet. https://en.wikipedia.org/wiki/Mars_ocean_hypothesis https://en.wikipedia.org/wiki/Mars_ocean_hypothesis Moreover, it's probably easier for an unicelular bacteria-like or archaea-like lifeform to survive. Some of the one from Earth can extract energy from some rocks or volcanic fumes, so they can survive in weird places. Edit: Fixed "Eukaryote to Prokaryote" -> "Prokaryote to Eukaryote"
  • pdonis 7y ago
    > the step from Eukaryote to Prokaryote I think you mean from Prokaryote to Eukaryote?
    • gus_massa 7y ago
      Thanks! Fixed.
  • ncmncm 7y ago
    We know the step from "pro" to "eu" is hard, in circumstances like young Earth, just from how long it took to happen. But other planets will have other circumstances.
  • dmix 7y ago
    > I think that the step from Prokaryote to Eukaryote is much more difficult. (Feel free to disagree. Nobody is sure.) Do you (or others) recommend any books exploring these conditions of life? The biology course I took online dabbled in explaining the difficulty of biological existence but wasn't the purpose.