Global carbon is fixed in the biosphere through photosynthesis.Explain any two ways by which carbon is returned to the atmosphere
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0
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1342
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September 4, 2016
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Name the two type of nutrient cycles existing in nature. Where are their reservoirs present? State the functions of the reservoirs
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0
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1467
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September 4, 2016
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State the function of a reservoir in a nutrient cycle. Explain the simplified model of carbon cycle in nature
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0
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1952
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September 4, 2016
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Explain the carbon cycle with the help of a simplified model
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0
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4116
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September 4, 2016
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Name the pioneer species on a bare rock. How do they help in establishing the next type of vegetation? Mention the type of climax community that will ultimately get established
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0
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2627
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September 4, 2016
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Differentiate between two different types of pyramids of biomass with the help of one example of each
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0
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4361
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September 4, 2016
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Construct labelled grazing and detritus food chains with minimum three trophic levels each
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0
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1128
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September 4, 2016
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Why is it difficult to get rid of water hyacinth from a water body? Name one abiotic component and one biotic component of the ecosystem that get affected by its spread in the water body
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0
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3944
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September 4, 2016
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Explain standing crop in an ecosystem. Draw a pyramid of biomass when a small standing crop of phytoplanktons supports a large standing crop of zooplanktons in the sea
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0
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3847
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September 4, 2016
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Name the type of food chains responsible for the flow of larger fraction of energy in an aquatic and a terrestrial ecosystem respectively.Mention one difference between the two food chains
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0
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2359
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September 4, 2016
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Identify the type of the given ecological pyramids and give one example each of pyramid of number and pyramid of biomass in such cases
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1
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1890
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September 4, 2016
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State what does standing crop of a trophic level represent
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0
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1458
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September 4, 2016
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It is possible that a species may occupy more than one trophic level in the same ecosystem at the same time. Explain with the help of one example
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0
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3621
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September 4, 2016
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Why the pyramid of energy is always upright? Explain
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0
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4175
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September 4, 2016
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What is a detritus food chain made up of ? How do they meet their energy and nutritional requirements?
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0
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1621
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September 4, 2016
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Describe the process of decomposition of detritus under the following heads :
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1
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3817
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September 4, 2016
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Explain primary productivity and the factors that influence it
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1
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1485
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September 4, 2016
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What is primary productivity? Why does it vary in different types of ecosystems?
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1
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2058
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September 4, 2016
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Write a difference between net primary productivity and gross productivity
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0
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1158
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September 4, 2016
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Write the equation that helps in deriving the net primary productivity of an ecosystem
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0
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794
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September 4, 2016
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How is 'stratification' represented in a forest ecosystem?
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0
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1264
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September 4, 2016
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