Uttarakhand PMT Uttarakhand PMT Solved Paper-2009

  • question_answer
    Connecting link between Annelida and Mollusca is

    A)  Peripatus       

    B)  Lepidosiren

    C)  Neopilina       

    D)  Protopterus

    Correct Answer: C

    Solution :

    Connecting link is one, which exhibits characteristics of more than one groups. Neopilina, is a connecting link between phylum-Annelida and Mollusca. It shows annelidan  characters  like  presence  of trochophore larva, eggs divide by spiral cheavage as in polychaetes, presence of 5-6 pairs of (tenidica, 6 pairs of nephridia, 8 pairs of retracter muscles and two pairs of avricles. On the other hand, molluscan characters of Neopilina are presence of shell and mantle, presence of a flat muscular foot as found in chiton and presence of soft and dorsoventrally flattened body.


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