NCERT solutions for बायोलॉजी [अंग्रेजी] कक्षा १२ chapter 3 - Human Reproduction [Latest edition]

Humans reproduce ______.

Humans are ______.

Male and female gametes are ______.

Fill in the blanks:

Zygote is __________. (diploid/haploid)

The process of release of the ovum from a mature follicle is called ______.

Ovulation is induced by a hormone called ______.

The fusion of the male and the female gametes is called ______.

The zygote divides to form ______, which is implanted in the uterus.

The structure which provides vascular connection between the foetus and uterus is called ______.

With the help of a neat, labelled diagram describe the human male reproductive system.

Draw a labelled diagram of the female reproductive system.

Write two major functions of ovary.

Describe the structure of a seminiferous tubule.

Briefly describe the process of spermatogenesis.

Name the hormones involved in regulation of spermatogenesis.

Define spermiogenesis.

Define spermiation.

Draw a labelled diagram of sperm.

What are the major components of seminal plasma?

What are the major functions of male accessory ducts and glands?

What is oogenesis?

Draw a sectional view of human ovary and label the different follicular stages, ovum and Corpus luteum.

Draw a labelled diagram of a Graafian Follicle.

Name the function of the following:

Corpus luteum

Name the function of the following:

Endometrium

Name the functions - Acrosome of sperm.

Name the function of the following:

Sperm tail

Name the function of the following:

Fimbriae

Identify True/False statement. Correct false statement to make it true.

Androgens are produced by Sertoli cells.

Identify True/False statement. Correct false statement to make it true.

Spermatozoa get nutrition from Sertoli cells.

Identify True/False statement. Correct the false statement to make it true.

Leydig cells are found in the ovary.

Identify True/False statement. Correct the false statement to make it true.

Leydig cells are found in the ovary.

Identify True/False statement. Correct the false statement to make it true.

Oogenesis takes place in the corpus luteum.

Identify True/False statement. Correct false statement to make it true.

Menstrual cycle ceases during pregnancy.

Identify True/False statement. Correct false statement to make it true.

Presence or absence of hymen is not a reliable indicator of virginity or sexual experience.

What is menstrual cycle?

Which hormones regulate menstrual cycle?

Which hormones are involved in the induction of parturition?

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?

How many eggs are released by a human ovary in a month? How many eggs do you think would have been released if the mother gave birth to identical twins? Would your answer change if the twins born were fraternal?

How many eggs do you think were released by the ovary of a female dog which gave birth to 6 puppies?

How many eggs do you think were released by the ovary of a female dog which gave birth to 6 puppies?