Question

Write any five differences between Chondrichthyes and Osteichthyes​

Answer 1

Explanation:

Characteristics Chondrichthyes Osteichthyes

Type of scale present on skin Placoid scales Scales absent, if present, cycloid scales

Number of gills present 5-7 pairs of gills, not covered by operculum 4 pairs of gills, covered by operculum

Caudal fin Heterocercal Homocercal

Excretory waste Urea Ammonia

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