Yes, there is. The echidna is also a monotreme.
No. A platypus is not a placental mammal of any type, but a monotreme, which is an egg-laying mammal.
The platypus is not an invertebrate. It is a vertebrate, a member of the Kingdom Animalia. It is a mammal, specifically a monotreme, or egg-laying mammal.
A platypus is an egg laying mammal, or monotreme. Its actual species name is Ornithorhynchus anatinus.
No, they are different species just like any other species. They are not remotely related; nor are they even the same class of vertebrate. A platypus is a mammal (specifically, a monotreme) while a duck is a bird.
Platypus families do not have any particular name, because platypuses are generally solitary creatures which do not generally live in family groups, except for while the young are weaning. The family of the platypus is called Ornithorhynchidae.
Monotremes lay eggs. Neither the platypus nor the echidna (the only known monotremes) eat plants of any type.
The platypus should not be called anything else. It is just a platypus. It is not a duckbilled platypus, or any other such misnomer.
The platypus is completely original. It is not a "mixture" of any other animal.
The platypus is found only in Australia. It is not found in any other country.
Yes. The platypus is endemic to Australia, meaning it is not found in any other country.
No. The platypus does not eat other mammals; nor are there any weasels in Australia.
It doesn't. This is a myth. The platypus is not a mixture of any other animal.