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
Correct Answer: D
Solution :
[d] Crocodile, penguin, whale and dogfish, all are chordates. So, all of these have gill slits at some stage of development.You need to login to perform this action.
You will be redirected in
3 sec