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  1. It is stiff rod of special cells surrounded by connective tissue present in the mid-dorsal region and appears in the embryos of all chordates.

    2. A.

     Placenta
    B.

     Notochord
    C.

     Cranianta
    D.

     Ligule

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    Answer : Option B

    Explanation :

    Notochord is stiff rod of special cells surrounded by connective tissue present in the mid-dorsal region and appears in the embryos of all chordates.

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