“Evolution of novel genes”? Isn’t that the question at hand? Where do novel genes come from?
While octopus brains are very different from vertebrate brains, they share with vertebrates, a huge number of microRNAs.
The researchers say that the same relationship holds true for cuttlefish, chimpanzees, and humans.
Just as vertebrates differ greatly in intelligence and sentience, invertebrates may differ greatly too.
Even compared to each other, the genomes of three cephalopods studied had been broken up and extensively reorganized.