Yes kangaroos have a placenta.
No.
Yummy!
Yes, they do; the sub-class Eutheria (placental mammals) includes all orders of mammals except monotremes (platypuses and echidnas) and marsupials (opossums, kangaroos, etc.). Cetaceans (whales, dolphins and porpoises) are included.
Dog puppies have their own placentas. If the litter is 4 pups, then there will be 4 placentas (afterbirths).
placentas function during all your pregnancy all day and all night
Placentas.
Triplets can have separate placentas, but it depends on how they are conceived. If they are all fraternal (dizygotic), they typically have three separate placentas. If they are identical (monozygotic), they may share one placenta or have separate placentas depending on when the single fertilized egg splits. In some cases, a combination of both types can occur, leading to varying placenta arrangements.
placentae or placentas
Eating placentas.
Not really. The mother cat will usually eat the kitten placentas and will, as a result, get back a small amount of the protein she has expended in creating the kittens. But there is nothing special about the placentas, and depriving the mother cat of them will not hurt her.
Kangaroos are born as kangaroos.
No, they come from eggs, so no placenta