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Q. No.Which of the following statements regarding Chondrichthyes may not be true for majority of members of the class?
| 1. | Notochord is persistent throughout life. |
| 2. | Skin has placoid scales. |
| 3. | Fertilization is internal. |
| 4. | Mouth is located ventrally. |
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Subtopic: Â Comparative study of Cartilagenous & Bony Fishes |Â Class Chondrichthyes |
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