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NCERT solutions Biology Class 12 chapter 3 Human Reproduction

Chapters

NCERT Biology Class 12

Biology Textbook for Class 12

Chapter 3 - Human Reproduction

Pages 55 - 56

Fill in the blanks:

Humans reproduce __________. (asexually/sexually)

Q 1.01 | Page 55

Fill in the blanks:

Humans are__________. (oviparous/viviparous/ovoviviparous)

Q 1.02 | Page 55

Fill in the blanks

Male and female gametes are __________. (diploid/haploid)

Q 1.04 | Page 55

Fill in the blanks:

Zygote is __________. (diploid/haploid)

Q 1.05 | Page 55

Fill in the blanks:

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

Q 1.06 | Page 55

Fill in the blanks:

Ovulation is induced by a hormone called the __________

Q 1.07 | Page 55

Fill in the blanks:

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

Q 1.08 | Page 55

Fill in the blanks

The zygote divides to form __________, which is implanted in uterus

Q 1.1 | Page 55

Fill in the blanks:

The structure which provides vascular connection between the fetus and uterus is called __________.

Q 1.11 | Page 55

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

Q 2 | Page 56

Draw a labeled diagram of female reproductive system.

Q 3 | Page 55

Write two major functions each of ovary.

Q 4 | Page 56

Describe the structure of a seminiferous tubule.

Q 5 | Page 56

What is spermatogenesis? Briefly describe the process of spermatogenesis.

Q 6 | Page 56

Name the hormones involved in regulation of spermatogenesis.

Q 7 | Page 56

Define spermiogenesis

Q 8.1 | Page 56

Define spermiation

Q 8.2 | Page 56

Draw a labeled diagram of sperm.

Q 9 | Page 56

What are the major components of seminal plasma?

Q 10 | Page 56

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

Q 11 | Page 56

What is oogenesis? Give a brief account of oogenesis.

Q 12 | Page 56

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

Q 13 | Page 56

Draw a labeled diagram of a Graafian Follicle?

Q 14 | Page 56

Name the functions : Corpus luteum

Q 15.1 | Page 56

Name the functions - Endometrium

Q 15.2 | Page 56

Name the functions - Acrosome

Q 15.3 | Page 56

Name the functions - Sperm tail

Q 15.4 | Page 56

Name the functions - Fimbriae

Q 15.5 | Page 56

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

Androgens are produced by Sertoli cells. (True/False)

Q 16.1 | Page 56

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

Spermatozoa get nutrition from Sertoli cells. (True/False)

Q 16.2 | Page 56

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

Leydig cells are found in ovary. (True/False)

Q 16.3 | Page 56

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

Leydig cells are found in ovary. (True/False)

Q 16.3 | Page 56

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

Oogenesis takes place in corpus luteum. (True/False)

Q 16.5 | Page 56

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

Menstrual cycle ceases during pregnancy. (True/False)

Q 16.6 | Page 56

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

Presence or absence of hymen is not a reliable indicator of virginity or sexual experience. (True/False)

Q 16.7 | Page 56

What is menstrual cycle?

Q 17.1 | Page 56

Which hormones regulate menstrual cycle?

Q 17.2 | Page 56

What is parturition? Which hormones are involved in induction of parturition?

Q 18 | Page 56

Women are often blamed for producing female children. Consequently, they are ill-treated and ostracised. How will you address this issue scientifically if you were to conduct an awareness programme to highlight the values involved?

Q 19 | Page 56

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?

Q 20 | Page 56

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

Q 21 | Page 56

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

Q 21 | Page 56

NCERT Biology Class 12

Biology Textbook for Class 12
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