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KVPY Sample Paper KVPY Stream-SX Model Paper-8

  • question_answer
    To understand prey-predator relationship, Didymium (predator) and Paramecium (prey) were used. Paramecium population was grown with and sediment as hiding place or refuge. To this population, Didymium was introduced only once. What could happen to the prey population in the course of time?

    A) The population will steadily decrease and vanish

    B) The population will initially increase and then stabilize

    C) The population will initially decrease, then increase and stabilize

    D) The population will steadily increase

    Correct Answer: C

    Solution :

    First prey were eliminated from the clear fluid medium by the predators and then afterwards the predators starved to death in the absence of prey. The sand sediment served as a refuge for the prey from where they emerged later, increased its number via reproduction and finally reached the stable equilibrium.


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