Question

lamprey has no jaws? no teeth? no tongue? no vertebrae ​

Answer 1

Answer:

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Answer 2

Lamprey also known as peteromyzon is of class Cyclostomata which comes under division Agnatgha ( lacks jaw )

• these are jawless animals and most primitive.
• they come under sub phylum vertebrata
• they have rounded/ circular mouth with suctorial funnel
• endoskeleton is made up of cartilage
• they act as ectoparasite on some fishes
• 6 - 15 pairs of gill slits
• scales and paired fins are absent
• they have cartilaginous cranium and vertebral column
• circulatory system is closed
• development of lamprey is indirect through ammocoete larva which act as connecting link between cephalochordates ( Branchiostoma / amphioxus / lancelet ) and vertebrates ( cyclostomes ).