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Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion (A): At puberty, in boys, the voice begins to crack and thick hair grows on the face.
Reason (R): At puberty, there is decreased secretion of testosterone in boys.
- a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
- b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
- c)Assertion (A) is true but reason (R) is false.
- d)Assertion (A) is false but reason (R) is true.
- e)Both Assertion and Reason are false.
Correct answer is option 'C'. Can you explain this answer?
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Directions: In the following questions, a statement of assertion (A) ...
Puberty in boys is regulated by male sex hormone called testosterone, which are secreted by testes. In puberty, secondary sexual characteristics like growth of hair on face, chest, broadening of shoulders and deepening of voice occurs.
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Directions: In the following questions, a statement of assertion (A) ...
Assertion (A): At puberty, in boys, the voice begins to crack and thick hair grows on the face.
Reason (R): At puberty, there is decreased secretion of testosterone in boys.
The correct answer is option 'C' - Assertion (A) is true but reason (R) is false.
Explanation:
Puberty in Boys:
During puberty, boys undergo several physical and hormonal changes as they transition from childhood to adulthood. These changes are primarily controlled by hormones, especially testosterone.
1. Voice changes: During puberty, the larynx (voice box) in boys grows larger and the vocal cords lengthen and thicken. This leads to a deeper and more resonant voice. However, during this growth phase, the vocal cords may not lengthen uniformly, resulting in a temporary period of voice cracking. As the vocal cords continue to develop, the voice becomes deeper and more stable.
2. Facial hair growth: Another significant change during puberty is the growth of facial hair. As testosterone levels increase, it stimulates the development of secondary sexual characteristics, including the growth of facial hair. This typically begins with the appearance of thin, light-colored hair (vellus hair) on the upper lip and chin. Over time, vellus hair is replaced by terminal hair, which is thicker, coarser, and darker in color.
Reason (R):
The reason given in statement (R) is incorrect. There is an increased secretion of testosterone during puberty in boys, not a decreased secretion. Testosterone is a male sex hormone produced primarily in the testes, and its secretion increases significantly during puberty, triggering the development of secondary sexual characteristics.
Therefore, the correct answer is option 'C' - Assertion (A) is true but reason (R) is false. The voice cracks and facial hair growth in boys during puberty are primarily due to the increased secretion of testosterone, not a decreased secretion.
Reason (R): At puberty, there is decreased secretion of testosterone in boys.
The correct answer is option 'C' - Assertion (A) is true but reason (R) is false.
Explanation:
Puberty in Boys:
During puberty, boys undergo several physical and hormonal changes as they transition from childhood to adulthood. These changes are primarily controlled by hormones, especially testosterone.
1. Voice changes: During puberty, the larynx (voice box) in boys grows larger and the vocal cords lengthen and thicken. This leads to a deeper and more resonant voice. However, during this growth phase, the vocal cords may not lengthen uniformly, resulting in a temporary period of voice cracking. As the vocal cords continue to develop, the voice becomes deeper and more stable.
2. Facial hair growth: Another significant change during puberty is the growth of facial hair. As testosterone levels increase, it stimulates the development of secondary sexual characteristics, including the growth of facial hair. This typically begins with the appearance of thin, light-colored hair (vellus hair) on the upper lip and chin. Over time, vellus hair is replaced by terminal hair, which is thicker, coarser, and darker in color.
Reason (R):
The reason given in statement (R) is incorrect. There is an increased secretion of testosterone during puberty in boys, not a decreased secretion. Testosterone is a male sex hormone produced primarily in the testes, and its secretion increases significantly during puberty, triggering the development of secondary sexual characteristics.
Therefore, the correct answer is option 'C' - Assertion (A) is true but reason (R) is false. The voice cracks and facial hair growth in boys during puberty are primarily due to the increased secretion of testosterone, not a decreased secretion.
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Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion (A): At puberty, in boys, the voice begins to crack and thick hair grows on the face.Reason (R): At puberty, there is decreased secretion of testosterone in boys.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer?
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Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion (A): At puberty, in boys, the voice begins to crack and thick hair grows on the face.Reason (R): At puberty, there is decreased secretion of testosterone in boys.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion (A): At puberty, in boys, the voice begins to crack and thick hair grows on the face.Reason (R): At puberty, there is decreased secretion of testosterone in boys.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion (A): At puberty, in boys, the voice begins to crack and thick hair grows on the face.Reason (R): At puberty, there is decreased secretion of testosterone in boys.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer?.
Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion (A): At puberty, in boys, the voice begins to crack and thick hair grows on the face.Reason (R): At puberty, there is decreased secretion of testosterone in boys.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion (A): At puberty, in boys, the voice begins to crack and thick hair grows on the face.Reason (R): At puberty, there is decreased secretion of testosterone in boys.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion (A): At puberty, in boys, the voice begins to crack and thick hair grows on the face.Reason (R): At puberty, there is decreased secretion of testosterone in boys.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer?.
Solutions for Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion (A): At puberty, in boys, the voice begins to crack and thick hair grows on the face.Reason (R): At puberty, there is decreased secretion of testosterone in boys.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 10.
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Here you can find the meaning of Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion (A): At puberty, in boys, the voice begins to crack and thick hair grows on the face.Reason (R): At puberty, there is decreased secretion of testosterone in boys.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion (A): At puberty, in boys, the voice begins to crack and thick hair grows on the face.Reason (R): At puberty, there is decreased secretion of testosterone in boys.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer?, a detailed solution for Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion (A): At puberty, in boys, the voice begins to crack and thick hair grows on the face.Reason (R): At puberty, there is decreased secretion of testosterone in boys.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion (A): At puberty, in boys, the voice begins to crack and thick hair grows on the face.Reason (R): At puberty, there is decreased secretion of testosterone in boys.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion (A): At puberty, in boys, the voice begins to crack and thick hair grows on the face.Reason (R): At puberty, there is decreased secretion of testosterone in boys.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.e)Both Assertion and Reason are false.Correct answer is option 'C'. Can you explain this answer? tests, examples and also practice Class 10 tests.
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