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In the given diagram, some labels are missing. Identify them and select the correct option:

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Important Questions on Ecosystem

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Biology>Ecology and Environment>Ecosystem>Nutrient Cycles
In which of the following both pairs have correct combination?
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Biology>Ecology and Environment>Ecosystem>Nutrient Cycles
Schematically represent phosphorous cycle.
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Biology>Ecology and Environment>Ecosystem>Nutrient Cycles
Write Carbon cycle.
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Biology>Ecology and Environment>Ecosystem>Nutrient Cycles
In a recent forest fire at the silent valley, phosphorous from the dead organisms was released into the soil due to a specific organism. Name the organism.
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Biology>Ecology and Environment>Ecosystem>Nutrient Cycles

Which one of the following element never goes to the atmosphere?

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Biology>Ecology and Environment>Ecosystem>Nutrient Cycles
Name any one symbiotic nitrogen fixing bacteria. How does it help in nitrogen fixation?
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Biology>Ecology and Environment>Ecosystem>Nutrient Cycles
Differentiate between the carbon cycle and phosphorus cycle that operate in nature by giving two points.
MEDIUM
Biology>Ecology and Environment>Ecosystem>Nutrient Cycles
The primary producers of the deep-sea hydrothermal vent ecosystem are
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Biology>Ecology and Environment>Ecosystem>Nutrient Cycles
The oceanic carbon reservoir constitutes
MEDIUM
Biology>Ecology and Environment>Ecosystem>Nutrient Cycles
Describe the model of the phosphorous cycle in the terrestrial ecosystem.
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Biology>Ecology and Environment>Ecosystem>Nutrient Cycles
Represent the phosphorus cycle with a word diagram. 
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Biology>Ecology and Environment>Ecosystem>Nutrient Cycles
Select the pairs of sedimentary biogeochemical cycles.
I. Hydrogen cycle and water cycle
II. Phosphorus Cycle and sulphur cycle
III. Calcium cycle and magnesium cycle
IV. Carbon cycle and nitrogen cycle
MEDIUM
Biology>Ecology and Environment>Ecosystem>Nutrient Cycles
During ecological succession:
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Biology>Ecology and Environment>Ecosystem>Nutrient Cycles
Give an account of the phosphorus cycle of an ecosystem.
MEDIUM
Biology>Ecology and Environment>Ecosystem>Nutrient Cycles
Vertical distribution of different species occupying different levels in a biotic community is known as:
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Biology>Ecology and Environment>Ecosystem>Nutrient Cycles
If 20J of energy is trapped at producer level, then how much energy will be available to peacock as food in the following chain?
plant → mice → snake → peacock
HARD
Biology>Ecology and Environment>Ecosystem>Nutrient Cycles
Study the following graph of the metabolic rate of various terrestrial mammals as a function of their body mass and choose the correct option below.

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MEDIUM
Biology>Ecology and Environment>Ecosystem>Nutrient Cycles
Which process is unidirectional in nitrogen cycle?
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Biology>Ecology and Environment>Ecosystem>Nutrient Cycles
Which of the following statements is incorrect regarding the phosphorus cycle?
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Biology>Ecology and Environment>Ecosystem>Nutrient Cycles

Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem with four blanks (A-D). Identify the blanks.

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