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Organisms and Populations Test - 2
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Organisms and Populations Test - 2
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  • Question 1/10
    1 / -0

    Water which is available and absorbed by the plants exists as

    Solutions

    Water that exists between soil particles in small capillary pores is called capillary water. This water is available to plants and readily absorbed by them.

  • Question 2/10
    1 / -0

    The maximum birth rate that a species can achieve under ideal environmental conditions is:

    Solutions

    The maximum birth rate that a species can achieve under ideal environmental conditions is potential natality. It is the upper limit to biotic potential in the absence of mortality

  • Question 3/10
    1 / -0

    In a J-shaped growth curve, the lag phase signifies

    Solutions

    Lag phase in a J-shaped curve is a period of adaptation of animals to new environment, so it is characterised by slow or no growth in population.

  • Question 4/10
    1 / -0

    Which of the following statements is true with respect to Verhulst-Pearl logistic growth?

    Solutions

    According to Verhulst-Pearl logistic growth, a population grows in a habitat which has limited resources. In exponential or geometric growth curve, population grows in a habitat having unlimited resources.

  • Question 5/10
    1 / -0

    Which of the following pairs is incorrect?

    Solutions

    This is an incorrect pair. Pelagic fishes produce small sized but large number of offspring.

  • Question 6/10
    1 / -0

    Which of the following statements are correct?

    a. Oysters produce a small number of large sized offspring.
    b. Bamboo breed only once in lifetime.
    c. In both predation and parasitism, only one species is benefited.

    Solutions

    This is the correct answer as both statements b and c are true.

  • Question 7/10
    1 / -0

    The maximum population size of a species that an environment can sustain indefinitely is known as which of the following?

    Solutions

    Carrying capacity of a biological species in an environment is the maximum population size of the species that the environment can sustain indefinitely, given that it has all it needs for survival.

  • Question 8/10
    1 / -0

    Stenothermal organisms can survive in a

    Solutions

    Stenothermal organisms can tolerate and thrive in a narrow range of temperature.

  • Question 9/10
    1 / -0

    Choose the correct alternative from the following.

    Assertion (A): Small animals lose their body heat fast.
    Reason (R): Small animals have small surface/volume ratio.

    Solutions

    A is true but R is false. Small animals lose their body heat very fast but they do not have a small surface/volume ratio. In fact, small animals have large surface/volume ratio.

  • Question 10/10
    1 / -0

    'Suspend' is one of the ways by which organisms deal with stressful conditions. Match the organism with the way it undertakes to cope with stressful conditions.

    Method to suspend Organism
    1. Dormancy a. Zooplankton
    2. Hibernation b. Seed
    3. Aestivation c. Bear
    4. Diapause d. Snail
    Solutions

    Seeds go into a dormant state to cope with stressful conditions. They germinate under favourable conditions.
    Bears undergo hibernation to cope with extreme cold conditions.
    Snails undergo aestivation to avoid summer related problems.
    Zooplanktons enter diapause, a state of suspended development.

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