(a) (i) 1-Duckbill platypus, 2- lungfis,3-Peripatus
(b) (i) Duckbill platypus lays eggs like reptiles and has hair and mammala glands like mammals and therefore it is a link between reptiles and mammals.
(ii) Lungfish is a fish but breathes with lungs therefore it is a link between amphibians and pisces.
(iii)Peripatus is a connecting link between Phylum Annelida and Arthropoda withh segmented body, parapodia-like appendages and thin cuticle (Annelida) and breathes through trachea with open circulatory system (Arthropoda).
