Question

Crocodile and Penguin are similar to Whale and Dogfish in which one of the following features?​

Answer 1

Answer:

The crocodile, penguin, whale and dogfish, since all of them are chordates. They have gill slits at some stage, generally during early developmental stages. Gill slits are also called gill-clefts or pharyngeal-clefts. These gill slits are one of the four common features of all chordates.