Scales in chondrichthyes are

Teeth in chondrichthyes are modified

Teeth in chondrichthyes are modified

Assertion: Chondrichthyes swim constantly in water body to avoid sinking. Reason: In chondrichthyes, air bladder is not found.

Categorise the following fishes into oestichthyes and chondrichthyes ? a) Exocoetus b) Trygon

Write the differences between Osteichthyes and Chondrichthyes. Name an animal having pseudo-coelom.

Which types of scales are found in chondrichthyes and osteichthyes?

Which types of scales are found in chondrichthyes and osteichthyes?

Find the relationship between given words and suggest the suitable word for the fourth place. a) Annelida : Nephridia : : Arthropoda : …..... b) Osteichthyes : Cycloid scales : : Chondrichthyes : …......

Type of fertilisation in Chondrichthyes and osteichthyes is____