Tachyglossus is connecting link between
(A) Reptiles and mammals
(B) Reptiles and birds
(C) Amphibians and reptiles
(D) Bird and mammals

Hint: The short-beaked echidna (Jacky glosses osculates) is one of four living species of echidna and the only member of the genus Jacky glosses.

Complete answer:
Connecting links are those animals which have characteristics of two different groups. Let us now analyse the options and find the correct option.

Option A: The connecting link between Reptiles and mammals is Duck- billed platypus. It has mammalian characteristics like mammary glands hair and reptilian characteristics like laying eggs with egg yolk and shell.

Option B: The connecting link between Reptiles and birds is Archaeopteryx as it has wings like birds and it has teeth and tail similar to that of reptiles.

Option C: The connecting link between Amphibians and reptiles is Seymouria, which is a lizard-like animal.

Option d: Tachyglossus is a connecting link between Bird and mammals as they have hairy endotherms just like mammals and their cloaca is similar to that of cloaca found in animals belonging to reptiles. Therefore, this is the correct option.

Therefore, from the above explanation the correct option is (D) Bird and mammals.

Note: The short-beaked echidna was first described by George shows in 1792. The name Jack glosses means quick tongue. Jacky glosses is covered in for and species and has a distinctive snout and a specialized longer, which it uses to catch its insect prey at a great speed.