JCECE Medical JCECE Medical Solved Paper-2014

  • question_answer Conifers differ from grasses in the

    A)  production of seed from ovules

    B)  lack of xylem tracheids

    C)  absence of pollen tubes

    D)  formation of endosperm before fertilization

    Correct Answer: D

    Solution :

     Conifers (gymnosperms) differ from grasses (angiosperms) in the formation of endosperm before fertilisation.  In gymnosperms, as  endosperm is formed before fertilisation, thus it is a haploid tissue. While in angiosperms endosperm is formed as a result of double fertilisation (triple fusion) and is a triploid tissue(3n). In both angiosperms and gymnosperms, the seeds are produced from ovules. Xylem trachieds and pollen tube formation are also common in both classes.

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