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

1.
In Pisum sativum, the flower colour may be violet (V) or white (v). What proportion of the offspring in a cross of "VV × vv" would be expected to be violet?

25%
50%
75%
100%

View Solution

2.
Assertion (A) : The two chains of DNA have antipolarity.
Reason (R) : In one chain of DNA, ribose sugar at \(5^{\prime}\) end consists of a free phosphate moiety, while at the other end, the ribose sugar has free \(3^{\prime}\) - OH group.

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.

View Solution

3.
Choose a correct option that shows an interaction in which one species benefits while the other is neither harmed nor benefitted.

Mycorrhizal associations between fungi and roots of higher plants
Sea anemone and clownfish
Abingdon tortoises and goats in the Galapagos Island
Cuscuta on hedge plants

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4.
If a sperm nucleus is injected into an oocyte then all of the following events are bypassed except -

The swimming of sperm to meet the egg in the oviduct.
The sperm’s acquisition of motility in the epididymis.
A sperm comes in contact with the zona pellucida layer of the ovum.
The complex process like cell division and cell differentiation.

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5.
"Indo-Burma" is considered as a hotspot. What is meant by the term "hotspots" in biodiversity ? List two criteria used for determining a "hotspot". Name any two hotspots of India.

View Solution

6.
Assertion (A) : Hardy-Weinberg principle says that allele frequencies in a population are stable.
Reason (R) : Hardy-Weinberg principle is applicable only when genetic drift does not occur.

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.

View Solution

Define nutrition.

Types of Nutrition

CBSE CLASS XII Related Questions

1.
In Pisum sativum, the flower colour may be violet (V) or white (v). What proportion of the offspring in a cross of "VV × vv" would be expected to be violet?

2.
Assertion (A) : The two chains of DNA have antipolarity.
Reason (R) : In one chain of DNA, ribose sugar at \(5^{\prime}\) end consists of a free phosphate moiety, while at the other end, the ribose sugar has free \(3^{\prime}\) - OH group.

3.
Choose a correct option that shows an interaction in which one species benefits while the other is neither harmed nor benefitted.

4.
If a sperm nucleus is injected into an oocyte then all of the following events are bypassed except -

5.
"Indo-Burma" is considered as a hotspot. What is meant by the term "hotspots" in biodiversity ? List two criteria used for determining a "hotspot". Name any two hotspots of India.

6.
Assertion (A) : Hardy-Weinberg principle says that allele frequencies in a population are stable.
Reason (R) : Hardy-Weinberg principle is applicable only when genetic drift does not occur.

Comments

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Define nutrition.

Types of Nutrition

CBSE CLASS XII Related Questions

1.In Pisum sativum, the flower colour may be violet (V) or white (v). What proportion of the offspring in a cross of "VV × vv" would be expected to be violet?

2.Assertion (A) : The two chains of DNA have antipolarity.Reason (R) : In one chain of DNA, ribose sugar at \(5^{\prime}\) end consists of a free phosphate moiety, while at the other end, the ribose sugar has free \(3^{\prime}\) - OH group.

3.Choose a correct option that shows an interaction in which one species benefits while the other is neither harmed nor benefitted.

4.If a sperm nucleus is injected into an oocyte then all of the following events are bypassed except -

5."Indo-Burma" is considered as a hotspot. What is meant by the term "hotspots" in biodiversity ? List two criteria used for determining a "hotspot". Name any two hotspots of India.

6.Assertion (A) : Hardy-Weinberg principle says that allele frequencies in a population are stable.Reason (R) : Hardy-Weinberg principle is applicable only when genetic drift does not occur.

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
In Pisum sativum, the flower colour may be violet (V) or white (v). What proportion of the offspring in a cross of "VV × vv" would be expected to be violet?

2.
Assertion (A) : The two chains of DNA have antipolarity.
Reason (R) : In one chain of DNA, ribose sugar at \(5^{\prime}\) end consists of a free phosphate moiety, while at the other end, the ribose sugar has free \(3^{\prime}\) - OH group.

3.
Choose a correct option that shows an interaction in which one species benefits while the other is neither harmed nor benefitted.

4.
If a sperm nucleus is injected into an oocyte then all of the following events are bypassed except -

5.
"Indo-Burma" is considered as a hotspot. What is meant by the term "hotspots" in biodiversity ? List two criteria used for determining a "hotspot". Name any two hotspots of India.

6.
Assertion (A) : Hardy-Weinberg principle says that allele frequencies in a population are stable.
Reason (R) : Hardy-Weinberg principle is applicable only when genetic drift does not occur.