Question

The class having body covered with scales, respiration by gills and presence of fins.

Answer 1

Chondrichthyes :

1. Chondrichthyes is the class of organism having a body covered with scales, respiration by gills, and the presence of fins.
2. They are the marine and are largely sized animals, which is a spindle or flatten in shape.
3. Placoid (tooth-like) scales cover the skin.
4. The gills are responsible for respiration.
5. They swim and balance using fins.
6. Fins can be paired, such as pectoral fins or pelvic fins, or they can be median, such as dorsal fins, caudal fins, and anal fins.
7. Sharks, skates, rays, and chimaeras are among them.