all of them are connecting links.platypus is a prototheria n mammal and it is connective link between reptiles and mammals. Archaeopteryx is acl between reptoles and birds.Peripatus is cl between annelida and arthropoda.
all 3........archeoptaryx 4 reptiles and aves... platypus is 4 mammals and protheria... donno abt peripatus but it is surely a connecting link.....is it a Q frm BHu ???
Is it peripatus?