MEDIUM
Earn 100

Read the given statements and select the correct option.
Statement 1: Major reservoirs of phosphorus are phosphate rocks and fossil bone deposits laid down in the past geological ages.
Statement 2: During weathering of rocks, minute amounts of these phosphates dissolve in soil solution and are absorbed by the roots of the plants.

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Important Questions on Ecosystem

EASY
Write Carbon cycle.
EASY
In which of the following both pairs have correct combination?
EASY
Differentiate between the carbon cycle and phosphorus cycle that operate in nature by giving two points.
MEDIUM
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

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

EASY
Name any one symbiotic nitrogen fixing bacteria. How does it help in nitrogen fixation?
EASY
Schematically represent phosphorous cycle.
MEDIUM
The primary producers of the deep-sea hydrothermal vent ecosystem are
EASY
The oceanic carbon reservoir constitutes
MEDIUM
Describe the model of the phosphorous cycle in the terrestrial ecosystem.
HARD
Represent the phosphorus cycle with a word diagram. 
EASY
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
During ecological succession:
HARD
Give an account of the phosphorus cycle of an ecosystem.
MEDIUM
Vertical distribution of different species occupying different levels in a biotic community is known as:
EASY
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
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
Which process is unidirectional in nitrogen cycle?
MEDIUM
Which of the following statements is incorrect regarding the phosphorus cycle?
EASY

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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