Advertisements
Advertisements
प्रश्न
Name the functions - Acrosome of sperm.
What is the function of acrosome of sperm.
Name the function of the following:
Acrosome
Advertisements
उत्तर
It is a cap-like structure present in the anterior part of the head of the sperm. It contains the hyaluronidase enzyme, which hydrolyses the outer membrane of the egg, thereby helping the sperm to penetrate the egg at the time of fertilization.
संबंधित प्रश्न
How is 'oogenesis' markedly different from 'spermatogenesis' with respect to the growth till puberty in the humans?
Draw a sectional view of human ovary and label the different follicular stages, ovum and Corpus luteum.
Ovulation is induced by a hormone called ______.
The fusion of the male and the female gametes is called ______.
Describe the process of budding in hydra.
In case of sexual reproduction, newborn show similarities about characters. Explain this statement with suitable examples.
Draw a labeled sketch of a spermatozoan.
The following is the illustration of the sequence of ovarian events (a-i) in a human female.
Identify the figure that illustrates ovulation and mention the stage of oogenesis it represents.
Which of the following enter the maturation phase of oogenesis?
The secondary oocyte enter into the fallopian tube through the ______.
Identify the diploid cell.
Which of the following occurs during maturation phase of spermatogenesis?
Calculate the number of sperms and ova produced from 40 primary spermatocytes and 40 primary oocytes.
Identify the correct stages (P - S) in the given diagram of spermatogenesis.
First meiotic division is observed in ____________.
______ undergoes 2nd meiotic division during spermatogenesis.
Draw a labelled diagram of a Graafian Follicle.
How many sperms are formed from a secondary spermatocyte?
Extrusion of second polar body from egg nucleus occurs ______.
Which of the following stage of oogenesis forms a membrane called zona pellucida surrounding it?
Connective tissue around seminiferous tubules possess endocrine cells called ______.
Spermiation is the process of the release of sperm from ______.
At the time of organogenesis, genes regulate the process at different levels and at different time due to ______.
A reaction of granules content which harden the zona pellucida and ensures sure block to polyspermy is ______.
Preparation of sperm before penetration of ovum is ______.
The head of the epididymis at the head of the testis is called ______.
After the release of the secondary oocyte, the Graafian follicle develops into ______.
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?
How many spermatozoa are formed from one secondary spermatocyte?
Meiotic division of the secondary oocyte completed ______.
Name the germinal layers from which the following organs develop: Tongue, heart, sweat glands, vagina, mammary glands, kidney.
Answer the following:
How many primary spermatocytes and oocytes are required for the formation of 100 spermatozoa and ova?
Distinguish between human sperm and ovum.
What is spermatogenesis?
Draw a labelled diagram of a section through the ovary.
In our society the women are often blamed for giving birth to daughters. Can you explain why this is not correct?
What is the primary purpose of gametogenesis in organisms?
