Then God said, “Let the earth bring forth the living creature according to its kind: cattle and creeping thing and beast of the earth, each according to its kind”; and it was so.
(Genesis 1:24) NKJV
We can combine Noah’s flood, Peleg’s tectonics and knowledge of the process of devolution to help us clear up what level of variability is represented by the Biblical word KIND.
If a common ancestor of the Monotremes was a mating pair on Noah’s ark, and the Monotremes are ONLY found in Australia, then after Noah’s ark successive generations migrated as a population to the area which is now Australia.
After the break up of Pangaea, and the geographical isolation of the continent of Australasia, the population split and one part diverged to become the Platypus, the other diverged and further subdivided to become the various species of Echidna.
The differences between the Platypus and the Echidna didn’t evolve. It’s not new information which somehow materialized in the genome. The genetic and phenetic differences between Platypus and Echidna aren’t synapomorphies. All of the genetic variability represented by the Platypus and Echidna was present in their common ancestor which was a Biblical KIND.
Matty (Headwind) 