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How do shoulders and chest change in boy...

How do shoulders and chest change in boys during puberty ?

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At the age of puberty shoulders broaden and chest becomes wider as a result of growth.
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The most conspicuous visible change that occurs in boys during puberty is:

LAKHMIR SINGH & MANJIT KAUR-REACHING THE AGE OF ADOLESCENCE-EXERCISE
  1. Name one factor on which the hight of a person depends.

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  2. A nine year old boys is 120 cm tall. If the present height of the boy ...

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  3. How do shoulders and chest change in boys during puberty ?

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  4. How do hips of girls change during puberty ?

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  5. What is the other name of 'voice box' ?

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  6. Which of the two have a smaller voice box : grown up boys or grown up ...

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  7. What is the common name of the bulge (or projection) at the front of t...

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  8. What substance is secreted by sebacious glands ?

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  9. Name the time period in one's life when the brain has the greatest cap...

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  10. Name two glands present in the skin whose increased activity causes pi...

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  11. What name is given to those sexual characteristics in humans : Which...

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  12. What name is given to those sexual characteristics in humans : which...

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  13. Which of the following acts as endocrine gland as well as an exocrine ...

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  14. What is the other name of ductless glands ?

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  15. What is the term used for secretions of endocrine glands responsible f...

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  16. The female sex hormone is

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  17. Name the following : The male sex hormone

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  18. Hormone responsible for the development of secondary sexual characters...

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  19. Which of the following is a secondary sexual characteristic of a boy?

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  20. State the function of male sex hormone 'testosterone' .

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