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प्रश्न
Give one example each for an animal possessing placoid scales and that with cycloid scales.
टिप्पणी लिखिए
उत्तर
Placoid scales are tiny tough scales that cover the skin. Examples are Trygon and Pritis.
Cycloid scales are characterized by having a smooth outer margin. Examples are Catla and Clarias.
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Subphylum -Vertebrata/Craniata - Class: Chondrichthyes
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