JCECE Medical JCECE Medical Solved Paper-2005

  • question_answer
    The thallus of Volvox is called:

    A)  trichome      

    B)  coenobium

    C)  coenocyte     

    D)  parenchymatous

    Correct Answer: B

    Solution :

     Coenobium is hollow ball like flagellated colony of a definite number of cells, arranged in a specific manner to form an integrated whole. The coenobial colony is of constant size and shape for any given species and surrounded by a common mucilaginous envelope. Coenocyte are the long multinucleate aseptate hyphal cells (filamentous body) in the lower  filamentous  fungi   (sub-division Zygomycotina and class Oomycetes in subdivision Mastigomycotina). A coenocytic or siphonous body results if karyokinesis occurs without cytokinesis, resulting in a giant multinucleate, cell. Trichome refers to hair like structure in plants,  often restricted to structures that  contain only cells derived from the epidermis. Parenchymatous cells are the thin primary walled living cells. The other features vary from cell to cell. The act as storage for food and water.


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