What features does the platypus share with mammals or non-mammalian organisms

Question

i need to list them in a table, to compare and contrast........so i need as much answers as possible

thanks=]

Answer 1

Mammalian:

fur

four-chambered heart

secretes milk to feed young

warm-blooded

Non-mammalian:

leathery "bill"

lays eggs

males have a poison spine on the foot

Answer 2

all mammals lactate (produce milk) for there young  as do,s  the duck billed platypus ie; the platypus is a  mammalian egg laying marsupial !!!!