Question

Duck-billed Platypus is connecting link between
A. Reptiles and mammals
B. Reptiles and birds
C. Echinoderms and chordates
D. Living and non-living

Answer 1

Hint: This species laying eggs but it has mammary glands and diaphragm. The snout of this species looks like a duck bill.

Complete answer:
Duck-billed platypusesare small, shy species. They have a flattened head and body that make them float easily across the water. The colour of their fur is dark brown on the top and tan on their bellies. These are dense and repel the water to keep them warm and dry even after hours of swimming. Their head and body grow to about 15 inches and tail grows to about 5 inches in length. Their most impressive attribute is their wonderful snout. It looks like a duck bill, but it's actually very soft and covered with thousands of receptors that enable the platypus sense prey.
Platypus are relating to mammals and reptiles because they have similar characteristics to both species. Platypus split from mammals around 165-166 million years ago and maintained certain reptile traits, such as laying eggs. It had certain mammalian features, such as holding mammary glands and diaphragm.
Archaeopteryx is believed to be a communicative link between reptiles and birds. It appears like a bird and has wings of a bird. However, the teeth and tail are identical to the reptiles.
Balanoglossus is known to be the connecting link between Echinoderms and Chordates.

Thus, the correct answer is option A. i.e., Reptiles and mammals.

Note:Platypusesare long-lived, living in captivity for 20 years or more and in the wild for up to 12 years. Scientists claim that these mysterious animals are the first ancestors of modern mammals.