Advertisements
Advertisements
प्रश्न
Give scientific reason.
There is a menopause when women are 45-50 years old.
Advertisements
उत्तर
- The natural cessation of menstruation that occurs between the age of 45-50 years is known as menopause.
- Menopause occurs as the secretion of hormones controlling the functions of the female reproductive system either stops or becomes irregular.
APPEARS IN
संबंधित प्रश्न
Describe the process of oogenesis in human female.
Describe the process of spermatogenesis with the help of diagram.
Explain two main process in sexual reproduction.
The male sex hormone testosterone is secreted from ____________.
Mammalian egg is ____________.
Calculate the number of sperms and ova produced from 40 primary spermatocytes and 40 primary oocytes.
Identify the CORRECT sequence of events.
Select the pair of cells which does not divide further by mitosis.
How many autosomes does a human primary spermatocyte have?
How many sperms are formed from a secondary spermatocyte?
Which of the following contains a fluid filled cavity called antrum?
At the time of organogenesis, genes regulate the process at different levels and at different time due to ______.
Preparation of sperm before penetration of ovum is ______.
The process of release of spermatozoa from Sertoli cells into cavity of the seminiferous tubules is called ______.
Layers of an ovum from outside to inside is ______.
Head of epididymis is called as ______.
Penetration of the sperm in the ovum is followed by ______
Distinguish between human sperm and ovum.
In our society the women are often blamed for giving birth to daughters. Can you explain why this is not correct?
Complete the analogy with respect to the structure of sperm.
Nebenkern : ‘X’ : : Acrosome is formed from : ‘Y’
