Crocodile and penguin are similar to whale and dogfish in which one of the following features?
A. Possess a solid single stranded central nervous system
B. Lay eggs and guard them till they hatch
C. Possess bony skeleton
D. Have gill slits at some stage
Answer:D
Crocodile and penguin are similar to whale and dogfish in which one of the following features?
A. Possess a solid single stranded central nervous system B. Lay eggs and guard them till they hatch C. Possess bony skeleton D. Have gill slits at some stage