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Life Process | Nutrition, Mode of Nutrition and Photosynthesis | CBSE Class 10 Science | Biology
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Life Process
Maintenance of living organisms is essential even if they are moving, resting, or even sleeping.
The processes which together perform the function of maintenance of ‘life’ are called as life processes.
Nutrition, respiration, circulation, excretion are examples of essential life processes.
In unicellular organisms, all these processes are carried out by that single cell.
In multicellular organisms, well-developed systems are present to carry out the processes.
Nutrition
The process of acquiring food that is needed for nourishment and sustenance of the organism is called nutrition.
There are two main modes of nutrition, autotrophic and heterotrophic.
Heterotrophic nutrition has subtypes as holozoic, saprophytic, and parasitic nutrition.
Photosynthesis
– Photosynthesis is an important process by which food is formed.
– The plants make food using sunlight and water, which provides nourishment to other organisms and themselves.
– Chlorophyll present in the green parts absorbs light energy.
– This light energy is used to split water into hydrogen and oxygen.
– Hydrogen is then used to reduce carbon dioxide into carbohydrates, typically glucose.
– Chlorophyll is essential for photosynthesis and stomata to facilitate the intake of carbon dioxide.
All the above-mentioned topics are described in an interactive and efficient manner so that the students could easily understand them.
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