Advertisements
Advertisements
प्रश्न
The fusion of the male and the female gametes is called ______.
Advertisements
उत्तर
The fusion of the male and the female gametes is called fertilisation.
Explanation:
The process of fusion of a sperm with an ovum is called fertilisation. During fertilisation, a sperm comes into contact with the zona pellucida layer of the ovum and induces changes in the membrane that block the entry of additional sperms. Thus, it ensures that only one sperm can fertilise an ovum.
APPEARS IN
संबंधित प्रश्न
Give the name and function for ‘A’ and ‘B’ from the diagram given below
Women are often blamed for producing female children. Consequently, they are ill-treated and ostracized. How will you address this issue scientifically if you were to conduct an awareness programme to highlight the values involved?
Ovulation is induced by a hormone called ______.
Multiple choice question.
The given figure shows human sperm. Various parts of it are labelled as A, B, C, and D. Which labelled part represents acrosome?
Explain the structure of secondary oocyte.
Give scientific reason.
Older women are more likely to give birth to children with some abnormalities.
Answer the following type of question Assertion (A) and Reason (R).
(A) - In human males, testes are extra-abdominal and lie in scrotal sacs.
(R) - Scrotum acts as a thermoregulator and keeps the temperature lower by 2°C for normal sperm production.
Which of the following enter the maturation phase of oogenesis?
Identify the labels (i-iv) in the given diagram of the ovum.
Formation of ____________ is an indication of the termination of oogenesis.
Which of the following correctly describes the secondary oocyte?
500 spermatozoa are formed from ____________ secondary spermatocytes.
First meiotic division is observed in ____________.
Draw a labelled diagram of a Graafian Follicle.
Conversion of spermatid into sperm is called as _______.
Middle piece of mammalian sperm possesses ______.
Acrosome reaction in sperm is triggered by ______.
Sertoli cells are found in ______.
Corona radia is made up of ______.
How many functional sperms and how many ova will be formed by a primary spermatocyte and a primary oocyte.
Cavity of graafian follicle is ______.
Gray crescent is the area ______.
Besides activating the egg another role of a sperm is to carry ______ to egg.
After the release of the secondary oocyte, the Graafian follicle develops into ______.
Sperms can be stored for several years in liquid nitrogen with a temperature of ______.
Follicular atresia is:
Human milk differs from cow's milk because human milk contains:
How many primary oocytes produce one oogonia?
Draw a neat and labelled diagram of spermatogenesis.
