Question

mention two ways by which amount of CO2 is fixed in nature

Answer 1

The two ways of fixation of carbon-dioxide are as follows :

(i) By the process of photosynthesis.

The plants utilize the carbon - dioxide from the atmosphere in order to prepare food in the presence of sunlight and chlorophyll.This process is called photosynthesis .

Plants may store food or utilize it for their consumption . The products of photosynthesis are glucose and the oxygen is given out in the atmosphere.

(ii) Respiration of certain organisms

Certain anaerobic bacteria utilize the carbon-dioxide from the air to respire.

It is also found that marine organism use carbon-dioxide for their shells.Note that the carbon-dioxide in this case is dissolved in water.

Hope it helps !

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Answer 2

Two different ways by which amount of CO2 is fixed in nature are:
1.Green plants convert CO2 into Glucose in the presence of sunlight by the process of photosynthesis.
2.Many Marine animals use carbonates dissolves in sea-water to make their cells.


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