- Nutrition: It is the mode of taking food by an organism and its utilization by the body.
- Nutrients: The components of food that provide nourishment to the body.
- All organisms take food and utilise it to get energy for the growth and maintenance of their bodies.
- Green plants synthesise their food themselves by the process of photosynthesis. They are autotrophs.
- Photosynthesis: Green plants prepare their own food with the help of chlorophyll (found in green plants), carbon dioxide and water taken from the environment in presence of sunlight . This process is known as photosynthesis.
- Plants use simple chemical substances like carbon dioxide, water and minerals for the synthesis of food.
- Chlorophyll and sunlight are the essential requirements for photosynthesis.
- Complex chemical substances such as carbohydrates are the products of photosynthesis.
- Solar energy is stored in the form of food in the leaves with the help of chlorophyll.
- Oxygen is produced during photosynthesis.
- Oxygen released in photosynthesis is utilised by living organisms for their survival.
- Fungi derive nutrition from dead, decaying matter. They are saprotrophs. Plants like Cuscuta are parasites. They take food from the host plant.
- A few plants and all animals are dependent on others for their nutrition and are called heterotrophs.
- Parasitic: Organisms that live on the body of other organisms.
- All parasitic plants feed on other plants as either:
(i) Partial Parasites: Obtain some of their nutrition from the host, e.g. painted cup
(ii) Total Parasites: dependent completely on the host for nutrition, e.g. mistletoe.
- Saprophytic: Organisms that obtain nutrition from dead and decaying plant and animal matter.
- Mushrooms, moulds and certain types of fungi and bacteria.
- Insectivorous Plants: Green plants which obtain their nourishment partly from soil and atmosphere and partly from small insects. Example: pitcher plant, bladderwort, and venus fly trap.
- Symbiosis: Mode of nutrition in which two different individuals associate with each other to fulfil their requirement of food.
- Lichens found on tree trunks is the association between algae and fungus. Algae obtains water from fungus and it in turn obtains food from algae.
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CBSE
Class–VII | CHAPTER – 1 Integers | NMMS
Revision Notes à Click
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Tracing
Changes Through a Thousand Years | NMMS Revision Notes | Class 7 | Social à Click
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New
Kings and Kingdoms | NMMS Revision Notes | Class 7 | Social à Click Here
The
Delhi Sultanate | NMMS Revision Notes | Class 7 Social à Click
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The
Mughal Empire | NMMS Revision Notes | Class 7 Social à Click Here
Tribes
Nomads and Settled Communities | NMMS Revision Notes | Class 7 Social à Click
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Devotional
Paths to the Divine | NMMS Revision Notes | Class 7 Social à Click
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The
Making of Regional Cultures | NMMS Revision Notes | Class 7 Social à Click
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Eighteenth
Century Political Formations | NMMS Revision Notes | Class 7 Social à Click
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Environment
| NMMS Revision Notes | Class 7 Social à Click
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Inside
Our Earth | NMMS Revision Notes | Class 7 Social à Click Here
Our
Changing Earth | NMMS Revision Notes | Class 7 Social à Click Here
Air |
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Water
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Human
Environment Interactions the Tropical | NMMS Revison Notes | Class 7 Social à Click
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Life
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On
Equality | NMMS Revision Notes | Class 7 Social à Click Here
How
the State Government Works | NMMS Revision Notes | Class 7 Social à Click
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Role
of the Government in Health | NMMS Revision Notes | Class 7 Social à Click
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Growing
up as Boys and Girls | NMMS Revision Notes | Class 7 Social à Click
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Women
Change the World | NMMS Revision Notes | Class 7 Social à Click Here
Understanding
Media | NMMS Revision Notes | Class 7 Social à Click Here
Markets
Around Us | NMMS Revision Notes | Class 7 Social à Click Here
A
Shirt in the Market | NMMS Revision Notes | Class 7 Social à Click Here
Nutrition
in Plants | NMMS Revision Notes | Class 7 Science à Click Here
Nutrition
in Animals | NMMS Revision Notes | Class 7 Science à Click Here
Heat |
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Acids
Bases And Salts | NMMS Revision Notes | Class 7 Science à Click Here
Physical
And Chemical Changes | NMMS Revision Notes | Class 7 Science à Click
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Respiration
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Transportation
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Force
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Reproduction
In Plants | NMMS Revision Notes | Class 7 Science à Click Here
Motion
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Electric
Current and its Effects | NMMS Revision Notes | Class 7 Science à Click
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Light
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Waste
Water Story | NMMS Revision Notes | Class 7 Science à Click Here
How
When and Where | NMMS Revision Notes | Class 8 Social à Click
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From
Trade to Territory | NMMS Revision Notes | Class 8 Social à Click Here
Ruling
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Tribals
Dikus and Vision of Golden Age | NMMS Revision Notes | Class 8 Social à Click
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When
People Rebel | NMMS Revision Notes | Class 8 Social à Click Here
Weavers
Iron Smelters and Factory Owners | NMMS Revision Notes | Class 8 Social à Click
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Civilising
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Women
Caste and Reform | NMMS Revision Notes | Class 8 Social à Click Here