Question

Crocodile and Penguin are similar to whale and Dog fish in which one of the following characters

• A. Possess bony skeleton
• B. Possess a solid single stranded central nervous system
• C. Have gill slits at some stage
• D. Lay eggs and guard them till they hatch.

Answer 1

The correct option is C Have gill slits at some stage

Crocodile, Penguine,Whale,Dogfish belongs to phylum Chordata. They all have gill slits at early embryonic stage.

So, the correct answer is C.