Define nutrition.

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Nutrition is the process by which food is consumed by organisms, converted into energy and the nutrients are used from the food.

Organisms use nutrients for their life processes through the process of nutrition.
Nutrients provide energy and biomolecules to organisms for necessary functions.
The main nutrients are carbohydrates, protein, fat, vitamins, minerals, and roughage.
The mode of nutrition varies from one organism to another.

Types of Nutrition

The 2 main modes of nutrition are –

Autotrophic Nutrition

In the autotrophic mode of nutrition, organisms make use of simple inorganic matter like water and carbon dioxide in the presence of chlorophyll and light in order to synthesize food on their own.

Heterotrophic Nutrition

All organisms can not produce food on their own, they depend on others for nutrition. These organisms are known as heterotrophs, and the mode of nutrition through which they acquire food is called heterotrophic nutrition.

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CBSE CLASS XII Related Questions

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(I) Write the scientific names of the two species of filarial worms causing filariasis.
(II) How do they affect the body of infected persons ?
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Briefly explain the events of fertilisation and implantation in an adult human female.

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Explain the different organizational levels of biodiversity at the genetic, species, and ecological levels, providing a suitable example for each category.

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The process of copying genetic information from template strand of DNA into RNA is called transcription. It is mediated by RNA polymerase. Transcription takes place in the nucleus of eukaryotic cells. In transcription, only a segment of DNA and only one of the strands is copied into RNA.

Define nutrition.

Types of Nutrition

CBSE CLASS XII Related Questions

1.
(I) Write the scientific names of the two species of filarial worms causing filariasis.
(II) How do they affect the body of infected persons ?
(III) How does the disease spread ?

2.
Work out separate monohybrid crosses up to $F_2$ generation between two pea plants and two Antirrhinum plants, both having contrasting traits with respect to the colour of the flower. Comment on the patterns of inheritance in the crosses carried out in such two cases.

3.
Mention the source and the role of the following in providing defence against infection in the human body : (I) Histamine (II) Interferons

4.
Briefly explain the events of fertilisation and implantation in an adult human female.

5.
Explain the different organizational levels of biodiversity at the genetic, species, and ecological levels, providing a suitable example for each category.

6.
The process of copying genetic information from template strand of DNA into RNA is called transcription. It is mediated by RNA polymerase. Transcription takes place in the nucleus of eukaryotic cells. In transcription, only a segment of DNA and only one of the strands is copied into RNA.

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Define nutrition.

Types of Nutrition

CBSE CLASS XII Related Questions

1.(I) Write the scientific names of the two species of filarial worms causing filariasis. (II) How do they affect the body of infected persons ? (III) How does the disease spread ?

2.Work out separate monohybrid crosses up to $F_2$ generation between two pea plants and two Antirrhinum plants, both having contrasting traits with respect to the colour of the flower. Comment on the patterns of inheritance in the crosses carried out in such two cases.

3.Mention the source and the role of the following in providing defence against infection in the human body : (I) Histamine (II) Interferons

4.Briefly explain the events of fertilisation and implantation in an adult human female.

5.Explain the different organizational levels of biodiversity at the genetic, species, and ecological levels, providing a suitable example for each category.

6.The process of copying genetic information from template strand of DNA into RNA is called transcription. It is mediated by RNA polymerase. Transcription takes place in the nucleus of eukaryotic cells. In transcription, only a segment of DNA and only one of the strands is copied into RNA.

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
(I) Write the scientific names of the two species of filarial worms causing filariasis.
(II) How do they affect the body of infected persons ?
(III) How does the disease spread ?

2.
Work out separate monohybrid crosses up to $F_2$ generation between two pea plants and two Antirrhinum plants, both having contrasting traits with respect to the colour of the flower. Comment on the patterns of inheritance in the crosses carried out in such two cases.

3.
Mention the source and the role of the following in providing defence against infection in the human body : (I) Histamine (II) Interferons

4.
Briefly explain the events of fertilisation and implantation in an adult human female.

5.
Explain the different organizational levels of biodiversity at the genetic, species, and ecological levels, providing a suitable example for each category.

6.
The process of copying genetic information from template strand of DNA into RNA is called transcription. It is mediated by RNA polymerase. Transcription takes place in the nucleus of eukaryotic cells. In transcription, only a segment of DNA and only one of the strands is copied into RNA.