Organisms and Populations


  1. What type of human population is represented by the following age pyramid?









  1. View Hint View Answer Discuss in Forum

    This age pyramid represents the declining population of any organism. Population decline is the reduction over time in region’s census. It can be caused for several reasons that includes heavy immigration disease, famine or sub-replacement fertility.

    Correct Option: C

    This age pyramid represents the declining population of any organism. Population decline is the reduction over time in region’s census. It can be caused for several reasons that includes heavy immigration disease, famine or sub-replacement fertility.


  1. Which one of the following is one of the characteristics of a biological community?









  1. View Hint View Answer Discuss in Forum

    Stratification is one of the characteristics of biological community. Natality, mortality, age, structure and sex ratio are basic characteristics of a population.

    Correct Option: A

    Stratification is one of the characteristics of biological community. Natality, mortality, age, structure and sex ratio are basic characteristics of a population.



  1. A country with a high rate of population growth took measures to reduce it. The Figure below shows age-sex pyramids of populations A and B twenty years apart.

    Select the correct interpretation about them: Interpretations:









  1. View Hint View Answer Discuss in Forum

    ‘A’ is more recent and shows slight reduction in growth rate.

    Correct Option: D

    ‘A’ is more recent and shows slight reduction in growth rate.


  1. What is true about the isolated small tribal populations?









  1. View Hint View Answer Discuss in Forum

    There is a decline in population as boys marry girls only from their own tribe in the isolated small tribal populations.

    Correct Option: A

    There is a decline in population as boys marry girls only from their own tribe in the isolated small tribal populations.



  1. Geometric representation of age structure is a characteristic of









  1. View Hint View Answer Discuss in Forum

    Geometric representation of age structure a characteristic of population.

    Correct Option: A

    Geometric representation of age structure a characteristic of population.