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AMU Medical AMU Solved Paper-2000

  • question_answer
    In the vast marine ecosystem, certain sea develops red coloration. This red color is due to the presence of large population of which one of the following organisms?

    A)                  Trichodesmium erythrium

    B)                  Physarium

    C)                  Dinoflagellates

    D)                  Diatoms and members of red algae

    Correct Answer: A

    Solution :

                     Trichodesmium erythrueum is a blue-green algae, in which the red pigment predominates. This species flourishes in red sea and is responsible for the red colour of its water. Dinoflagellates consist of golden brown photosynthetic protists. They are called so due to presence of 2 flagella. Some of them produce red tide (eg, Gonyaulax, Gymnodinuim). Diatoms are unicellular golden brown autotrophic protists. Siliceous cells of diatoms pile up to form diatomaceous earth or diatomite.


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