Douglas, I’m not saying that there are cats that don’t have heritable variation, any more than you’re saying that there are cats that don’t have varying numbers of offspring. I’m saying that the fact that cats have heritable variation is just as relevant to evolution as the fact that their number of offspring varies.
Douglas, I’m not saying that there are cats that don’t have heritable variation, any more than you’re saying that there are cats that don’t have varying numbers of offspring. I’m saying that the fact that cats have heritable variation is just as relevant to evolution as the fact that their number of offspring varies.