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What will you look for to identify the sex of the following?

1. Female Ascaris - Sharply curved posterior end
2. Male frog - A copulatory pad on the first digit of the hind limb
3. Female cockroach - Anal cerci
4. Male shark - Claspers borne on pelvic fins

Correct answer: Male shark - Claspers borne on pelvic fins

Solution

Male sharks are identified by claspers, which are modified pelvic fins used to transfer sperm. The other options describe traits that are either not sex-specific or are incorrectly matched to the sex.

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