Numerous features suggest that a platypus is not a fish.
Other than the platypus's bill, which some may construe as bird-like in shape, all the features of a platypus suggest that it is not a bird. Even this bill serves a completely different function to that of any duck - the bill is fitted with electro-receptors, which is a feature no bird has. The platypus has a mammalian type of hip structure, it has fur rather than feathers, and it secretes milk to feed its young (although not in exactly the same way that most mammals do).
The only feature of the platypus that is remotely birdlike is the fact that it lays eggs. Even these are different to those of a bird. A bird's eggs are hard-shelled, while the platypus lays soft-shelled, leathery eggs.
They have fur, breathe through lungs, are warm-blooded, and they feed their young milk, though not through nipples, but through patches of skin that milk oozes out of.
No features suggest it is a bird. It is a mammal. The bill of a platypus serves a quite different function to that of any bird, as bird do not have electroreceptors in their bills. Platypuses do lay eggs, but even the eggs are quite different to those of a bird.
No. The platypus does not undergo any form of metamorphosis; no mammal does. The platypus is a unique species, with distinct features, but none of these are examples of incomplete metamorphosis.
A platypus is a monotreme, which is an egg-laying mammal.
The platypus is a monotreme mammal.
The platypus is not a reptile - it is an egg-laying mammal.
The platypus is a mammal. Although it lays eggs in a burrow, and hunts for food in the water, it is a warm-blooded mammal that breathes using lungs, not gills. It also feeds its young on mothers' milk, something which no fish does.
Yes, the platypus is a mammal.
No. A platypus is not a placental mammal of any type, but a monotreme, which is an egg-laying mammal.
a platypus is a mammal even though it doesn't give live birth. I'm not sure why.
The platypus is a mammal. Specifically, it is a monotreme, which is an egg-laying mammal. It belongs to the family ornithorhynchidae.
The platypus is in the mammal classification. It is a monotreme, or egg-laying mammal.
The mammal group to which the platypus belong is monotremata.There are only two animals in that group: the platypus and the echidna, and they are known as monotremes.