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List two functions performed by the testis in human beings.

[7] How do Organisms Reproduce?
Chapter: [7] How do Organisms Reproduce?
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Along the path of the vas-deferens the secretions of which gland provide nutrition to the sperms? 

[7] How do Organisms Reproduce?
Chapter: [7] How do Organisms Reproduce?
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In human males, the testes lie in the scrotum, because it helps in the ______ 

[7] How do Organisms Reproduce?
Chapter: [7] How do Organisms Reproduce?
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A pair of ducts arising from testis, which carries sperms are ______ 

[7] How do Organisms Reproduce?
Chapter: [7] How do Organisms Reproduce?
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In the following Question, the Assertion and Reason have been put forward. Read the statements carefully and choose the correct alternative from the following:

Assertion: In the male reproductive system, the transport of sperm takes place in a fluid that also provides nutrition.

Reason: Protective glands and seminal vesicles secret in the vas deferens.

[7] How do Organisms Reproduce?
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During adolescence, several changes occur in the human body. Mark one change associated with sexual maturation in boys

[7] How do Organisms Reproduce?
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In human males, the testes lie in the scrotum, because it helps in the

[7] How do Organisms Reproduce?
Chapter: [7] How do Organisms Reproduce?
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The correct sequence of organs in the male reproductive system for transport of sperms is

[7] How do Organisms Reproduce?
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Give two reasons for the appearance of variations among the progeny formed by sexual reproduction.

[7] How do Organisms Reproduce?
Chapter: [7] How do Organisms Reproduce?
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How are power and focal length of a lens related? You are provided with two lenses of focal length 20 cm and 40 cm respectively. Which lens will you use to obtain more convergent light?

[9] Light – Reflection and Refraction
Chapter: [9] Light – Reflection and Refraction
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Assertion (A): Testes in human males are located outside the abdominal cavity in scrotum.

Reason (R): Scrotum provides a lower temperature than the normal body temperature for sperm formation.

[7] How do Organisms Reproduce?
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An object of height 10 cm is placed 25 cm away from the optical centre of a converging lens of focal length 15 cm. Calculate the image distance and height of the image formed.

[9] Light – Reflection and Refraction
Chapter: [9] Light – Reflection and Refraction
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Given below is a certain situation. Analyze and describe its possible impact on a person:

Testes of a male boy are not able to descend into the scrotum during his embryonic development.

[7] How do Organisms Reproduce?
Chapter: [7] How do Organisms Reproduce?
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Given below is a certain situation. Analyze and describe its possible impact on a person:

The Vas deferens of a man is plugged.

[7] How do Organisms Reproduce?
Chapter: [7] How do Organisms Reproduce?
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Given below is a certain situation. Analyze and describe its possible impact on a person:

Prostate and seminal vesicles are not functional.

[7] How do Organisms Reproduce?
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List two roles of Seminal vesicles and prostate gland in the human reproductive system.

[7] How do Organisms Reproduce?
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List two roles of the Testis in the human reproductive system.

[7] How do Organisms Reproduce?
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Mention the functions of Uterus in the human female reproductive system.

[7] How do Organisms Reproduce?
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 Why does menstruation occur?

[7] How do Organisms Reproduce?
Chapter: [7] How do Organisms Reproduce?
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State the function of Fallopian tubes.

[7] How do Organisms Reproduce?
Chapter: [7] How do Organisms Reproduce?
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< prev  1621 to 1640 of 1786  next > 
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