What are limbs? What are their functions?

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Limbs are appendages attached to the torso that aid in movement, support, and balance. They are present in many vertebrates including humans and are usually composed of bones, muscles, and joints. In humans, there are four limbs: two arms and two legs. The limbs play an important role in human mobility, allowing us to perform various physical activities such as walking, running, jumping, and grasping. They also help us maintain balance and stability while performing these movements.

The four main limbs of the human body are:

Arms- Used for grasping, holding, and reaching.
Legs- Used for walking, running, jumping, and balancing.
Hands- Used for fine motor movements and dexterity.
Feet- Used for support, balance, and movement.

Human body limbs

Human Body Limbs

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CBSE CLASS XII Related Questions

1.
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

2.
Monascus purpureus is a yeast used commercially in the production of which one of the following?

Ethanol
Streptokinase
Citric acid
Statins

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3.
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

4.
Assertion (A) : The milk produced by transgenic cow 'Rosie' was nutritionally more balanced product for human babies than natural cow milk.
Reason (R) : It was human protein enriched milk containing human alpha lactaglobulin.

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

5.
A student performed some crosses in plants and represented the result in the form of bar graphs as shown below. Each graph displays the phenotypic proportion of the progeny. Study the graphs and answer the questions :
(c) What conclusion can you draw from the results of bar graphs of crosses I and II ? Name the genetic principle illustrated.

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6.
Which of the following is a secondary consumer ?

Grasshopper
Cow
Fish
Hawk

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What are limbs? What are their functions?

CBSE CLASS XII Related Questions

1.
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.

2.
Monascus purpureus is a yeast used commercially in the production of which one of the following?

3.
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?

4.
Assertion (A) : The milk produced by transgenic cow 'Rosie' was nutritionally more balanced product for human babies than natural cow milk.
Reason (R) : It was human protein enriched milk containing human alpha lactaglobulin.

6.
Which of the following is a secondary consumer ?

Comments

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What are limbs? What are their functions?

CBSE CLASS XII Related Questions

1.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.

2.Monascus purpureus is a yeast used commercially in the production of which one of the following?

3.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?

4.Assertion (A) : The milk produced by transgenic cow 'Rosie' was nutritionally more balanced product for human babies than natural cow milk. Reason (R) : It was human protein enriched milk containing human alpha lactaglobulin.

6.Which of the following is a secondary consumer ?

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
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.

2.
Monascus purpureus is a yeast used commercially in the production of which one of the following?

3.
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?

4.
Assertion (A) : The milk produced by transgenic cow 'Rosie' was nutritionally more balanced product for human babies than natural cow milk.
Reason (R) : It was human protein enriched milk containing human alpha lactaglobulin.

6.
Which of the following is a secondary consumer ?