Question

write any four important characteristics and one example of each class of cyclostomata and chondrichyes?

Answer 1

Cyclostomata is a group of agnathans that comprises the living jawless fishes: the lampreys and hagfishes. 

Answer 2

cyclostoma...
they r chordates and come under vertebrates and then
below class agnatha
that r jawless fishes
it consists of circular mouth
example is hagfish


chondrichtyes

they too r chordates n come under vertebrates but
below class gnasthomata
they r jawed vertebrates
they r cartiliginous fishes I. e they have cartilage instead of bones....
example r sharks

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