L
leonhardprintz
Guest
“Kinds” are a pre-scientific term and does not correspond to the notion of ‘species’, or the more precise definition of ‘clades’.… except thousands of years of intensive animal and plant breeding by humans, which suggests kinds don’t evolve into other kinds
If you go by the modern definition of species (look up cladistics), then evolutionary biology actually doesn’t claim that species evolve into other species. All the descendants of the early canid that humans tamed, remain of that species. Just as all human descendants remain human. And all the descendants of apes, remain apes, of which we are one.
Humans are a species of Hominid, along with Neanderthal, Homo Heidelbergensis, Homo Hobbitus… All Hominids are Apes, because they share a close common ancestor with all the other apes. Just as all Apes are Monkeys. Just as all Monkeys are Synapsids and all Synapsids (the common ancestor of all mammals) are Amniotes (common ancestor of all terrestrial animals).
And this goes all the way back to the Eukaryotes.
You are of the species Eukaryote, your cells are yeast-like, with a membrane, a nucleus and an endo-plasmatic reticulum. You are of the species Amniote, you have lunges for instance capable of breathing, and share features in common with an Amniote.
All descendants of each common ancestor share key features in common with them. As evolution progresses it becomes more and more ‘stiff’. Each species only being able to vary within its own clade.
True such variation can be very broad especially if the potency of the earlier species was very great, but the further we go the more narrowly life can diversify. This is why we can recognise legless lizards as not being snakes, even though they have a tail like body.
No matter how many offspring we have, and no matter how much they vary potentially. They’d still be human.
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