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
Explain the development of a secondary oocyte (ovum) in a human female from the embryonic stage upto its ovulation. Name the hormones involved in this process.
Male and female gametes are ______.
The process of release of the ovum from a mature follicle is called ______.
Define spermiation.
What is oogenesis?
Give scientific reason.
Older women are more likely to give birth to children with some abnormalities.
The glandular accessory organ which produces the largest proportion of semen is ____________.
Mammalian egg is ____________.
Answer the following type of question Assertion (A) and Reason (R).
(A) - Head of the sperm consists of acrosome and mitochondria.
(R) - Acrosome contains spiral rows of mitochondria.
Define gametogenesis.
Complete the analogy.
1 primary spermatocyte : 4 spermatozoa :: 1 primary oocyte : ____________.
Which of the following enter the maturation phase of oogenesis?
The part labelled as ______ contains the energy source that facilitates sperm motility.
Identify the enzyme released by the sperm which has lytic activity.
Which of the following is diploid?
What is the location of oogenesis?
Which of the following events take place during spermatogenesis?
Cavity of graafian follicle is ______.
How many sperms are formed from 4 primary spermatocytes?
Which of the following are called dual gland?
The region of the root tip whose cells undergo rapid elongation and enlargement and are responsible for the growth of the root in length is called the:
Human milk differs from cow's milk because human milk contains:
Germ cells present in the seminiferous tubules undergo ______
How many primary oocytes produce one oogonia?
The mother germ cells are transformed into a mature follicle through series of steps. Provide the missing steps in the blank boxes.
Which type of cell division forms spermatids from the secondary spermatocytes?
Draw a neat and labelled diagram of spermatogenesis.
Complete the analogy with respect to the structure of sperm.
Nebenkern : ‘X’ : : Acrosome is formed from : ‘Y’
