Question

Name the following
(i) The category of animals possessing backbone.
..................................................................................................................
(ii) The group of backboned animals but having no jaws.
..................................................................................................................
(iii) Any one cartilaginousfish.
..................................................................................................................

Answer 1

Answer:

(i)vertebrates

(ii)agnatha

(iii)the fish which has the skeleton made up of cartilages rather than bones.Eg: sharks , southern stingrays

Answer 2

i) Chordates

This is the phylum in which the organisms belonging to it has backbone. This helps them in supporting the body.

ii) Agnatha

This division includes the class named as Cyclostomata. Examples includes : Petromyzon, Hagfish, etc.

iii) Pristis is a fish that belongs to the group called Cartilaginous fishes. Scolidon fish also belongs to this group or class.