2. Sample Papers
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  4. Ecology And Environment

SSC Ecology And Environment Sample Paper NCERT Sample Paper-6

  • question_answer
    The population of an area tends to decrease by

    A)  Migration         

    B)  mortality

    C)  Immigration     

    D)  mutation

    Correct Answer: B

    Solution :

    [b] Mortality is also known as death rate. The rate at which individuals are lost by death is called mortality rate. i.e., number of organisms tend to decrease by death.


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