Life processes class 10th science

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 Autotrophic Nutrition

The word autotrophic has been derived from two Greek words auto meaning self & trophe means nutrition. In this type of Nutrition, living organisms synthesis their own food from the inorganic substances by the utilisation of energy. The organisms shows this types of Nutrition are called autotroph. 

Autotrophic is of two types:

1. Photosynthetic Nutrition:
 The green plants, most of the algae and some bacteria synthesize their food in the form of simple sugar from inorganic substances, carbon dioxide & water, in the presence of sunlight & chlorophyll. These organisms are known as photoautotrophic & the process is called photosynthesis.

2. Chemosynthetic Nutrition:
 Some bacteria synthesize their Organic food from inorganic substances by utilising energy released from oxidation of simple organic compounds. These are known as chemoautotrophic and the process is called chemosynthesis, ex. Sulphur bacteria, iron bacteria, Nitrosomonas,etc.



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