Which of the following features is used to id | vedclass

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(D) $1$. In $Ascaris$ (roundworm),the male is smaller than the female and has a curved posterior end,while the female is longer and has a straight pos

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Male Shark - Claspers on the pelvic fins.

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(D) $1$. In $Ascaris$ (roundworm),the male is smaller than the female and has a curved posterior end,while the female is longer and has a straight posterior end. Thus,option $A$ is incorrect.$2$. In frogs,the male can be identified by the presence of a copulatory pad (nuptial pad) on the first digit of the forelimb (not hind limb). Thus,option $B$ is incorrect.$3$. In cockroaches,the male possesses anal styles,while the female does not. Thus,option $C$ is incorrect.$4$. In male sharks (cartilaginous fish),the pelvic fins bear specialized copulatory organs called claspers,which are used to transfer sperm to the female. This is a correct diagnostic feature for identifying the sex of a shark. Thus,option $D$ is correct.

Which of the following features is used to identify the sex of the given animal?

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