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Ecosystem Test - 48

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Ecosystem Test - 48
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Crystalline rocks are natural source of
    Solution
    • There are 4 layers of Earth, namely lithosphere (land), hydrosphere (water), biosphere (living), and atmosphere (air). 
    • The lithosphere of the Earth makes up the hard and rigid outer layer of the Earth. It is a reservoir of phosphorus. 
    • The largest reservoir of phosphorus is sediments or sedimentary rocks.
    • Crystalline rocks are sedimentary rocks. They are the natural source of phosphorous.  
    Thus, the correct answer is 'Phosphorous.' 
  • Question 2
    1 / -0
    Which is correct for secondary succession?
    Solution
    Secondary succession occurs opposite to the process of primary succession. It starts after the processes like forest fire, hurricane, etc which reduces the established ecosystem.
  • Question 3
    1 / -0
    Which of the following represents sedimentary type of nutrient cycle?
    Solution
    There are 4 layers of Earth, namely lithosphere (land), hydrosphere (water), biosphere (living), and atmosphere (air). Lithosphere of Earth includes the crust and the uppermost mantle. It makes up the hard and rigid outer layer of the Earth. It is reservoir of phosphorus. The largest reservoir of phosphorus is sediments or sedimentary rocks. Hence, phosphorous represents sedimentary type of nutrient cycle. 
    Thus, the correct answer is 'Phosphorous.' 
  • Question 4
    1 / -0
    The circulation or cycling of elements in an ecosystem is known as
    Solution
    Nutrient cycling is defined as the circulation or cycling of elements in an ecosystem. It is an essential process of an ecosystem. In this, a particular nutrient or element is transferred from environment to one living being to another living being and comes back to the environment. The various elements include carbon, nitrogen, sulphur, phosphorous, etc. 
    Thus, the correct answer is 'Nutrient cycling.'
  • Question 5
    1 / -0
    Pyramid of numbers in a forest ecosystem is
    Solution
    Pyramid of numbers represent the number of organisms at each trophic level. The pyramids of numbers in a forest ecosystem is inverted. In this, the first trophic level consists of plants. The number of plants are least in number. The primary consumers includes animals and birds which consumes producer. Their number is large as compared to primary  producers. The number of secondary consumers or carnivores are maximum in number in a forest ecosystem.
    Thus, the correct answer is 'Inverted.'
  • Question 6
    1 / -0
    Which of the following occurs in abiotic component of an ecosystem?
    Solution
    An ecosystem is made up of biotic and abiotic components. Biotic components include plants, animals, microorganism. Abiotic components include nonliving things such as water, air, temperature, materials of the soil. Essential material includes minerals like carbon, nitrogen, phosphorous. Cycling of materials include release of minerals back to the environment. 
    Thus, the correct answer is 'Cycling of materials.'
  • Question 7
    1 / -0
    Biome has organisms of various trophic levels 
    Solution
    Biome is a community that consists of plants and animals having common characteristics in a given environment. In other words, biome has organisms of various trophic levels reacting with abiotic environment. The different biomes include aquatic biome, forest biome, desert biome, tundra biome and grassland biome.
    Thus, the correct answer is 'Reacting with abiotic enviornment.'
  • Question 8
    1 / -0
    Relationships in an ecosystem can be depicted through
    Solution
    An ecological pyramid is a graphical representation showing relationships between organisms at different trophic level in an ecosystem. Pyramid of biomass is the graphical representation of total amount of living material at each trophic level of a food chain. Pyramid of numbers represent the number of individuals in each trophic level of a food chain. Pyramid of energy represents the amount of energy at each trophic level of a food chain. The ecological pyramid are either upright, inverted or spindle shaped.
    Thus, the correct answer is 'All of the above.'
  • Question 9
    1 / -0
    A habitat not suitable for primary productivity is
    Solution
    A habitat not suitable for primary productivity is cave. Cave lacks sunlight and primary plant productivity. The animals and plants are present only at the entrance of cave as limited sunlight reaches at the entrance.
    Thus, the correct answer is 'Cave.'
  • Question 10
    1 / -0
    Pyramid of numbers in a pond ecosystem is
    Solution
    In pond ecosystem, the shape of pyramid of number is always upright. It represents the number of individuals at each trophic level. In this, the energy is maximum at producer level, followed by primary consumer level (herbivores), followed by secondary consumer level (carnivores). The base of the pyramid of number represents the producers in a pond ecosystem. 
    Thus, the correct answer is 'Upright.'
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