Anccestors of cyclostomes are

Assertion : Characters of cyclostomes show an advance over Amphioxus. Reason : Cyclostomes have some degenerated characters.

Write four salient features of cyclostomes.

What is the special character seen in cyclostomes during spawning?

What kind of skin do cyclostomates have?

Choose the correct statements with reference to hyaline cartilage (a) It is bluish white translucent and glass like cartilage (b) Matrix shows collagen fibres and elastin fibres (c) It forms embryonic endoskeleton in cyclostomes and adult cartilage fishes (d) It is the strongest cartilage with perichondrium.

Choose the correct statements with reference to hyaline cartilage (a) It is bluish white translucent and glass like cartilage (b) Matrix shows collagen fibres and elastin fibres (c) It forms embryonic endoskeleton in cyclostomes and adult cartilage fishes (d) It is the strongest cartilage with perichondrium.

Choose the correct statements with reference to hyaline cartilage (a) It is bluish white translucent and glass like cartilage (b) Matrix shows collagen fibres and elastin fibres (c) It forms embryonic endoskeleton in cyclostomes and adult cartilage fishes (d) It is the strongest cartilage with perichondrium.

Assertion Cyclostomes belong to Agnatha. Reason True jaws are absent in cyclostomes.

The primitive condition of the cyclostomate is indicated by their