Which of the following animals has three chambered heart?
Match List-I with List-II
|List - I||List - II|
Choose the correct answer from the options given below :
Select the incorrect statements with respect to Cyclostomes:
(a) They lack scales and paired fins.
(b) They have circular mouth with jaws.
(c) They bear 6-15 pairs of gills.
(d) They migrate to deep sea for spawning.
Choose the most appropriate answer from the options given below:
Exoskeleton of arthropods is composed of: