Organisms and Populations


  1. Plants such as Prosopis, Acacia and Capparis represent examples of tropical









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    Deciduous forests are present in both northern and southern hemisphere contain broad leaved and hardwood. Deciduous trees – Oak, Maple, Chestnut etc. Evergreen forests occur in equatorial and subequatorial regions, important plants are Rosewood Ebony, Mahogany, Fig, etc. Grass lands are large plains covered by grasses. Prosopis, Acacia and Capparis are non succulent, thorny hot desert plants.

    Correct Option: A

    Deciduous forests are present in both northern and southern hemisphere contain broad leaved and hardwood. Deciduous trees – Oak, Maple, Chestnut etc. Evergreen forests occur in equatorial and subequatorial regions, important plants are Rosewood Ebony, Mahogany, Fig, etc. Grass lands are large plains covered by grasses. Prosopis, Acacia and Capparis are non succulent, thorny hot desert plants.


  1. What is the most important factor for the success of animal population?









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    Natality refers to the rate at which new individuals are born. Adaptability refers to the capacity of the organisms to adapt themselves to their environment.

    Correct Option: C

    Natality refers to the rate at which new individuals are born. Adaptability refers to the capacity of the organisms to adapt themselves to their environment.



  1. Choose the correct sequence of stages of growth curve for bacteria









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    The growth curve for bacteria is sigmoid. First phase is the phase of slow growthLag phase. Second phase is the period of accelerated growth - Log phase. Third phase is the phase when growth rate becomes stable - Stationary phase. Finally growth rate declines.

    Correct Option: A

    The growth curve for bacteria is sigmoid. First phase is the phase of slow growthLag phase. Second phase is the period of accelerated growth - Log phase. Third phase is the phase when growth rate becomes stable - Stationary phase. Finally growth rate declines.


  1. The semilog of per minute growing bacteria is plotted against time. What will be the shape of graph?









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    Semilog of per minute growing bacterium when plotted against time, would yield ascending straight line.

    Correct Option: C

    Semilog of per minute growing bacterium when plotted against time, would yield ascending straight line.



  1. Which of the following is a correct pair?









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    Opuntia is a xerophyte. Cuscuta is a parasite. Capsella is not a hydrophyte.

    Correct Option: A

    Opuntia is a xerophyte. Cuscuta is a parasite. Capsella is not a hydrophyte.