INDICATORS ON WESTERN GREY KANGAROO YOU SHOULD KNOW

Endothermy is actually a synapomorphy on the Mammalia, even though it could have arisen inside of a (now extinct) synapsid ancestor; the fossil report will not distinguish these opportunities. Convergent in birds. The joey nonetheless has no jaws to feed, so the mom's nipple grows to the younger's mouth and very gently forces milk into its mouth.