AMU Medical AMU Solved Paper-1995

  • question_answer
    Population exploiting a resource rapidly, and showing unbounding increase in numbers are

    A)  \[k-\]selected      

    B)  \[r-\]selected

    C)  growth selected   

    D)  unselected.

    Correct Answer: B

    Solution :

    : r and k selection operate in population ecology. r denotes the inherent rate of natural population increase and k the selection imposed on a population by limited food reserves. For r-selected species, r refers to the growth rate term in the logistic population growth model. For these species, population sizes and mortality tend to be variable and unpredictable. Since populations frequently are far from carrying capacity (K), intraspecific competition often is weak. Selection tends to favor individuals with rapid development, high and early reproduction that is not repeated, small body sizes, high resource requirements, and short lives. The potential for populations of\[r-\]. selected species to grow is large.


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