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प्रश्न
What changes are seen in boys at the time of puberty?
उत्तर
Boys at puberty develop hair in their armpits, chest, face and around the pubic region. They become muscular and their voices crack. Penis and testes become large. The testes begins producing sperms.
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संबंधित प्रश्न
List any four methods of contraception used by humans. State in brief two advantages of adopting such preventive methods.
Write the functions of the following parts in human female reproductive system:-
(i) Ovary
(ii) Oviduct
(iii) Uterus
Which of the following is not a part of the female reproductive system in human beings?
Differentiate between Sperm duct and fallopian rube (function)
Match the Column:
| no | Column A | Column B |
| 1 | Allele | Control of automobile exhaust |
| 2 | Leydig cells | Tourniquet |
| 3 | Utriculus | Alternate forms of genes |
| 4 | Snake bite | Dynamic equilibrium |
| 5 | Euro IV norms | Testosterone |
| Sudden change in genes | ||
| Static equilibrium |
Which part of the human body produces sperms?
Mention two functions of human ovaries.
During adolescence, several changes occur in the human body. Mark one change from the following associated with sexual maturation in boys.
Fill in the blank.
In humans, sperm production occurs in the organ ----------------.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
A zygote is the product of the fusion of male and female gametes.
