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Questions and Answers
Which of the following organisms exhibit holozoic nutrition?
Which of the following organisms exhibit holozoic nutrition?
What is the byproduct released during photosynthesis?
What is the byproduct released during photosynthesis?
Which process involves organisms getting their food from living organisms without killing them?
Which process involves organisms getting their food from living organisms without killing them?
Which pigment is responsible for the process of photosynthesis?
Which pigment is responsible for the process of photosynthesis?
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Which nutrient is stored in the form of starch in plants?
Which nutrient is stored in the form of starch in plants?
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Which of the following allows for the exchange of gases during photosynthesis?
Which of the following allows for the exchange of gases during photosynthesis?
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What is the primary purpose of nutrition in living organisms?
What is the primary purpose of nutrition in living organisms?
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Which type of nutrition involves synthesizing food from simple inorganic substances?
Which type of nutrition involves synthesizing food from simple inorganic substances?
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What is the term for the process of obtaining food from dead and decaying organisms?
What is the term for the process of obtaining food from dead and decaying organisms?
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Which of the following organisms exhibit autotrophic nutrition?
Which of the following organisms exhibit autotrophic nutrition?
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What is the term for the mode of nutrition in which organisms obtain their food directly or indirectly from plants?
What is the term for the mode of nutrition in which organisms obtain their food directly or indirectly from plants?
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How many main types of heterotrophic nutrition are mentioned in the text?
How many main types of heterotrophic nutrition are mentioned in the text?
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Study Notes
Nutrition - A Life Process
Nutrition is one of the essential life processes that allows organisms to acquire the food required for their nourishment and sustenance. It is a pivotal biological process that helps living beings to obtain their energy from various sources. Nutrients are the substances that provide nutrition based on body requirements. The mode of nutrition varies from one species to another, with different types of organisms utilizing different sources of food and energy.
Autotrophic Nutrition
Autotrophic nutrition is the process in which organisms synthesize their food from simple inorganic substances like carbon dioxide and water, in the presence of sunlight and chlorophyll. Green plants and some bacteria, for example, exhibit autotrophic nutrition, synthesizing their food through photosynthesis. This mode of nutrition is called the autotrophic mode of nutrition.
Heterotrophic Nutrition
Heterotrophic nutrition is the process in which organisms get their food directly or indirectly from plants. All animals, fungi, and some bacteria depend on plants and other organisms for food. The three main types of heterotrophic nutrition are saprophytic, parasitic, and holozoic nutritions.
Saprophytic Nutrition
Saprophytic nutrition is the process in which organisms obtain their food from dead and decaying organisms. They break down the food material outside their body and then absorb it. Examples of organisms that exhibit saprophytic nutrition include mushrooms, bread mould, yeast, and some bacteria.
Parasitic Nutrition
Parasitic nutrition is the process in which organisms get their food from living organisms (host) without killing them. Examples of organisms that exhibit parasitic nutrition include cuscuta, orchids, ticks, lice, leeches, round worm, tape worm, and plasmodium.
Holozoic Nutrition
Holozoic nutrition is the process in which organisms take food directly and then digest and absorb it. Examples of organisms that exhibit holozoic nutrition include amoeba, paramaecium, birds, fishes, and humans.
Nutrition in Plants
Plants acquire their food through the process of photosynthesis, which involves the conversion of light energy into chemical energy, splitting of water molecules into hydrogen and oxygen, and reduction of carbon dioxide to carbohydrates. Chlorophyll, the green pigment present in the leaves, is responsible for this process. The food prepared is carbohydrate, which is stored in the form of starch, and oxygen is released as a byproduct. Stomata, tiny pores present in the leaves, facilitate the exchange of gases for photosynthesis to take place.
In conclusion, nutrition is a fundamental life process that allows organisms to acquire the food and energy required for their growth, maintenance, and repair. The mode of nutrition varies among different species, with autotrophic and heterotrophic nutrition being the two main types. Understanding these processes is crucial for understanding the overall functioning and survival of living organisms on our planet.
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Description
Test your knowledge on the essential life processes of nutrition that allow organisms to acquire food and energy for their sustenance. Explore autotrophic and heterotrophic nutrition, including aspects like saprophytic, parasitic, and holozoic nutritions, and the process of photosynthesis in plants. Understanding these biological processes is vital for comprehending the sustenance and survival of living organisms.
