Cycling of Materials


 
 
Concept Explanation
 

Cycling of Materials

Cycling of Materials (Nutrient Cycles):

Of the more than hundred elements known to occur in nature, thirty to forty are required by living organisms.

These elements not only provide the building blocks for the living. but are also needed for the operation of the living system. These elements which are essential for life are known as biogenic nutrients. Biogenic nutrients are absorbed by plants from the soil, water arid air. They enter the living world at the producer level and get transferred to other trophic levels.

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Sample Questions
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Question : 1

Which of the following are correct :

(a) Biogenic nutrients are absorbed by plants from the soil, water arid air.

(b) Biogenic nutrients enter the living world at the producer level and get transferred to other trophic levels.

Right Option : C
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Question : 2

Biogenic nutrients are absorbed by plants from the _______________________.

Right Option : D
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Question : 3

Making new containers from crushed glass helps to ___________________

Right Option : D
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