Question

characteristic features of chondrichthyes ​

Answer 1

Answer:

Key Features of Chondrichthyes

Resemble bony fish and terrestrial vertebrates in having jaws and paired appendages.

An electroreceptive system is well developed.

Endoskeleton entirely cartilaginous.

No swim bladder or lung.

Answer 2

Answer:

Apart from electric rays, which have a thick and flabby body, with soft, loose skin, chondrichthyans have tough skin covered with dermal teeth (again, Holocephali is an exception, as the teeth are lost in adults, only kept on the clasping organ seen on the caudal ventral surface of the male), also called placoid scales .

Explanation: