40. Scales of Elasmobranch are
(A) Placoid
(B) Cycloid
(C) Ctenoid
(D) Ganoid
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Explanation:
The characteristics that are diagnostic to elasmobranchs are: Five to seven gill openings with spiracle (secondarily lost in some species). Body covered with placoid scales
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scales of Elasbronchi are
(A) placoid skills
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