Question

Platypus is the connecting link between
(A)Birds and reptiles
(B)Reptiles and mammals
(C)Mammals and birds
(D)None of the above

Answer 1

Hint: Platypus are the only mammals that lay eggs instead of giving birth to live young.

Complete answer:
Platypus is an egg-laying mammal. They belong to the subclass Prototheria or Monotremata. They are kept under mammals because they nourish their young ones with their own milk. It also shows mammalian characters like mammary organs, hair, diaphragm; single aortic curve and so on and furthermore shows reptilian characters in having huge coracoids in pectoral support and in laying eggs with yolk and shell that is the reason Platypus is an interfacing link between reptiles and mammals (warm blooded animals).

Hence the correct answer is option(B)

Note: The platypus (Ornithorhynchus anatinus), in some ways depicted as the duck-billed platypus, is a semi aquatic egg-laying warm blooded animal. The creature is depicted as a mix of natural species: the duck (bill and webbed feet), beaver (tail), and otter (body and fur). Males are additionally venomous. They have sharp stingers closely following their back feet and can utilize them to convey a solid poisonous hit to any enemy. Platypuses are one of only a couple venomous warm blooded creatures, which is one of their more reptilian attributes. Be that as it may, in contrast to snakes, a platypus' toxin isn't in his teeth. Rather, males have an empty spike on every rear leg from which toxin is dispensed but only sometimes. In spite of the fact that the spike itself is consistently there, the toxin organ to which it is associated is occasionally initiated and just delivers toxin during mating season, showing that its utilization is for fighting off contending males.