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Ecosystem Test - 33

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Ecosystem Test - 33
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Weekly Quiz Competition
  • Question 1
    1 / -0
    The flow of materials from non living components to living components and back to the non living components in a more or less cyclic manner is called 
    Solution
    A biogeochemical cycle or inorganic-organic cycle is a circulating or repeatable pathway by which either a chemical element or a molecule moves through both biotic (bio-) and abiotic (geo-) compartments of an ecosystem. 
  • Question 2
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    Total amount of energy trapped by green plants in food is called ____.
    Solution
    The total quantity of solar energy converted into chemical energy by green plant is known as gross primary production. 
    A portion of gross production is used by the producers for their various metabolic activities. The remainder of energy after utilization is called as net primary production.
    So, the correct answer is 'Gross primary production'
  • Question 3
    1 / -0
    The number of individuals of a species in a particular ecosystem at a given time remains constant due to
  • Question 4
    1 / -0
    Concept of ecological pyramid is given by 
    Solution
    An ecological pyramid is a graphical representation to describe the number of organisms, energy relationships, and biomass of an ecosystem. They are also called as Eltonian pyramids after Charles Elton, who developed the concept of ecological pyramids. 
    Therefore, the correct answer is option B.
  • Question 5
    1 / -0
    Gross primary productivity is 
    Solution
    The total energy fixed by plants (autotrophs) in a community through photosynthesis is referred to as gross primary productivity (GPP). Because all the energy fixed by the plant is converted into sugar, it is theoretically possible to determine a plant's energy uptake by measuring the amount of sugar produced. A proportion of the energy of gross primary productivity is used by plants in a process called as respiration. Respiration provides a plant with the energy needed for various plant physiological and morphological activities. 
  • Question 6
    1 / -0
    Maximum photosynthesis takes place by 
    Solution
    Primary production is the synthesis of food through the process of photosynthesis, which uses light as its source of energy. The primary production in the ocean is performed by free-living microscopic organisms called phytoplankton. Larger autotrophs, such as the sea grasses and seaweeds are generally confined within the photic zone. The majority of free-floating production takes place within microscopic organisms (phytoplankton)
    So, the correct answer is 'Phytoplankton'
  • Question 7
    1 / -0
    The pyramid of numbers in grassland ecosystem will be  ?
    Solution
    Pyramid of numbers is the relationship between the numbers of producers, herbivores and carnivores at successive trophic levels. In grassland, the producers, which are mainly grasses are always maximum in number as compared to the primary consumers (herbivores) like rabbits, mice etc. are lesser in number than the grasses, the secondary consumers, snakes and lizards are lesser in number than the rabbits and mice. Finally, the top (tertiary) consumers hawks or other birds are least in number. Thus, the correct answer is option A.
  • Question 8
    1 / -0
    Fill in the blanks. 

    All living organisms in an ecosystem interact with each other. Their growth, ................. and other activities are affected by the .................. components of the ecosystem.
  • Question 9
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    As energy is passed from one trophic level to another, the amount of usable energy
  • Question 10
    1 / -0
    Pyramid of energy in a forest ecosystem is 
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