Question

How many statements are correct for Dog fish (i) Both notochord and vertebral column is present (ii) Notochord persists through out life so vertebral column absent (iii) Vertebral column is present around notochord (iv) Teeth are modification of cycloid scales (v) Gills are without gill cover (vi) It has four pair of gills. (1) Three (2) One (3) Four (4) Five
pls it is urgent ​

Answer 1

Answer:

both notochord and vertebral column is present . option 2 is correct

Explanation:

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