How many statements are correct regarding the organisms shown in following figure? a) It belongs to the class Cyclostomata. b) It has 6 to 15 pairs of gill slits. c) Their body is devoid of scales. d) In males, pelvic fins bear claspers.

Step-by-step solution

The given picture is of a jawless vertebrate called Petromyzon. It belongs to the class Cyclostomata and they have an elongated body bearing 6-15 pairs of gill slits for respiration. Their body is devoid of scales and paired fins. Male cartilaginous fish have claspers formed from the posterior portion of their pelvic fin which serve as is used to channel semen into the female's cloaca. Such fish belong to the class Chondrichthyes.