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Carbon dioxide +water -> glucose +oxygen ( in presence of sunlight )
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Meghna Thapar 5 years, 6 months ago
Symbiosis is any type of a close and long-term biological interaction between two different biological organisms, be it mutualistic, commensalistic, or parasitic.
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Meghna Thapar 5 years, 6 months ago
The energy of a body due to its motion is called kinetic energy. Example a moving water can do work by turning the blades of a turbine for generating electricity.
The kinetic energy of a moving body is measured by the amount of work it can do before coming to rest.
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Meghna Thapar 5 years, 6 months ago
Heterotrophic nutrition is that mode of nutrition in which an organism cannot make its own food from simple inorganic materials like carbon dioxide and water, and depends on other organisms for its food.
Example: All animals obtain food by heterotrophic nutrition.
Some of the important types of heterotrophic nutrition are:
(i) Saprophytic nutrition: It is that nutrition in which an organism obtains its food from dead organic matter of dead plants, dead animals and rotten bread.
Example: Fungi and many bacteria obtain food by saprophytic nutrition.
(ii) Parasitic nutrition: It is that nutrition in which an organism derives its food from the body of another living organism (called its host) without killing it.
Example: Plasmodium, round worms and Cuscuta obtain food by parasitic nutrition.
(iii) Holozoic nutrition: It is that nutrition in which an organism takes the complex organic food materials into its body by the process of ingestion; the ingested food is digested and then absorbed into the body cells of the organism.
Example: Human beings and Paramecium.
Posted by Shreeyash Nikam 7 years, 5 months ago
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Meghna Thapar 5 years, 6 months ago
The mode of nutrition in amoeba as well as in humans is holozoic. However, digestion in amoeba takes place in a single cell and humans have a well developed digestive system consisting of digestive organs and digestive glands.
Posted by Sonam Dhurve 7 years, 5 months ago
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Meghna Thapar 5 years, 6 months ago
The walls of small intestine has finger like projections like villi which increases the surface area for absorption. The villi are richly supplied with blood vessels which take the absorbed food to each and every cell of the body, where it is utilised for obtaining energy, building up new tissues and the repair of old tissues.
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