CBSE Class 9 Answered
Diffrentiate between Bony and Cartilagenous fishes.
Asked by Rounak Singh | 16 Feb, 2011, 02:58: PM
Expert Answer
Dear student,
Cartilaginous fishes |
Bony fishes |
Marine |
Marine or fresh water |
Mouth ventral in position |
Mouth terminal in position |
Skin tough and covered with placoid scales |
Skin either naked or covered with cycloid or ctenoid scales |
5 or 7 pairs of gills open outside by gill slits, which are uncovered by operculum |
4 pairs of gills covered by operculum |
Tail is heterocercal |
Tail is homocercal |
Cloaca present |
Cloaca absent |
Excrete urea |
Excrete ammonia |
|
|
Regards, Team Topperlearning
Answered by | 17 Feb, 2011, 09:20: AM
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