HARD
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Write the important features of sedimentary cycle in an ecosystem.

Important Questions on Ecosystem

HARD
Biology>Ecology>Ecosystem>Nutrient Cycling
Give a graphical representation of the carbon cycle in nature.
EASY
Biology>Ecology>Ecosystem>Nutrient Cycling

Fill in the blank with the correct option from the bracket.

The major reservoir of carbon on Earth is _____. (soil, ocean, atmosphere)

HARD
Biology>Ecology>Ecosystem>Nutrient Cycling
Give a graphical representation of the phosphorus cycle in nature.
HARD
Biology>Ecology>Ecosystem>Nutrient Cycling
Represent the phosphorus cycle with a word diagram. 
EASY
Biology>Ecology>Ecosystem>Nutrient Cycling
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
EASY
Biology>Ecology>Ecosystem>Nutrient Cycling
Name any one symbiotic nitrogen fixing bacteria. How does it help in nitrogen fixation?
EASY
Biology>Ecology>Ecosystem>Nutrient Cycling
Write Carbon cycle.
EASY
Biology>Ecology>Ecosystem>Nutrient Cycling
Biogeochemical cycle having a small gaseous component is found in ___.
EASY
Biology>Ecology>Ecosystem>Nutrient Cycling
Differentiate between the carbon cycle and phosphorus cycle that operate in nature by giving two points.
EASY
Biology>Ecology>Ecosystem>Nutrient Cycling

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

MEDIUM
Biology>Ecology>Ecosystem>Nutrient Cycling
Describe the model of the phosphorous cycle in the terrestrial ecosystem.
EASY
Biology>Ecology>Ecosystem>Nutrient Cycling
In which of the following both pairs have correct combination?
MEDIUM
Biology>Ecology>Ecosystem>Nutrient Cycling
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.
EASY
Biology>Ecology>Ecosystem>Nutrient Cycling

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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MEDIUM
Biology>Ecology>Ecosystem>Nutrient Cycling
Which process is unidirectional in nitrogen cycle?
MEDIUM
Biology>Ecology>Ecosystem>Nutrient Cycling
With the help of a suitable diagram, describe the oxygen cycle occurring in the biosphere. Name the major process through which oxygen is returned to the atmosphere. Also, name the process through which oxygen enters from the atmosphere into the living world. What role do organisms play in the oxygen cycle?
EASY
Biology>Ecology>Ecosystem>Nutrient Cycling
Which one of the following is carbon containing molecule?
MEDIUM
Biology>Ecology>Ecosystem>Nutrient Cycling
Which step is not involved in the carbon cycle?
MEDIUM
Biology>Ecology>Ecosystem>Nutrient Cycling
Oxygen is returned to the atmosphere mainly by
EASY
Biology>Ecology>Ecosystem>Nutrient Cycling
Oxygen is returned to the atmosphere mainly by :