RAJASTHAN PMT Rajasthan - PMT Solved Paper-2008

  • question_answer
    In Mollusca, eye is present over a stalk, called

    A)  ostracum                           

    B)         operculum

    C)         ommatophores              

    D)         osphradium

    Correct Answer: C

    Solution :

    In Mollusca, each eye is located upon tumpy peduncle called ommatophore. In Mollusca, a loose skin fold, called mantle, dorsally covers most of the body and encloses a large mantle cavity. The mantle cavity contains the rectum, genital duct, a penis in males and a small bipectinate   chemoreceptor called osphradium. In Mollusca, the large oval aperture or mouth of the shell can be tightly closed by a thick, plate-like operculum attached to the foot.


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