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प्रश्न
Reproduction is linked to stability of population of a species. Justify the statement.
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उत्तर
During reproduction, DNA is passed from one generation to another so DNA is copied with consistency but with minor variations. This helps the maintenance of body design features that allow the organism to use a particular niche where it lives. Reproduction is therefore, linked to the stability of populations of species.
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संबंधित प्रश्न
What do you think is the significance of reproductive health in a society?
Is sex education necessary in schools? Why?
Write the full form of the following as it occur in biology :
HIV
What are the three types of methods used for birth control (or regulating child birth)? Give one example of each type.
What is the name of surgical method of birth control in human males in which the sperm ducts are cut and ligated (tied) at both ends?
Name the contraceptive device used by the human males which acts as a sheath over the male organ and traps the sperms in it.
Name the contraceptive device used by human females which is put over the cervix.
What is the name of surgical method of birth control (or preventing pregnancy) which is carried out in women?
People who die from AIDS are not killed by the virus itself. Explain.
In the surgical method of birth control available for males, the structures A in the reproductive system are cut and ligated (tied up) at both ends. This prevents the reproductive cells B from coming out from the organs C where they are made in the male body. Since B cannot come out from the male body, they cannot fuse with cell D in the body of a female and hence pregnancy is prevented.
(a) What are structures A?
(b) What are cells B?
(c) Name the organs C.
(d) What is cell D?
(e) What is the name of this surgical procedure for birth control available to males?
Differentiate between the following:
Spermatogenesis and oogenesis
Draw a well labelled diagram of L.S. human testis.
John and Radha were classmates since childhood. When Radha became eleven years old, she developed a little swelling on her neck. She visited the doctor who started medication for her. After a few years, John also developed a slight protrusion on his throat. He got worried and went to the doctor. But, the doctor assured him that it was a normal feature in boys while they are growing up. Can you think of any reasons for the difference in diagnoses?
It is believed that height of a child depends upon the genes inherited from parents. However, it is often seen that tall parents may have short children and vice-versa. Are there factors other than genes that can cause these variations?
Where was "Saheli" developed?
Reproductive health refers only to healthy reproductive functions. Comment.
Under which category of contraceptive methods, is the use of condom kept? In what way, its use is better as compared to other methods of contraception?
Given below are four aspects of Reproductive Health in Column A and their related information in Column B:
| Column A | Column B | ||
| S. No. | Terms used in Reproductive Health | S. No. | Significant information |
| (A) | MTP | (i) | Analysing fetal cells from amniotic fluid of the foetus |
| (B) | Amniocentesis | (ii) | Legalised in 1971 |
| (C) | Saheli | (iii) | Programme initiated in 1951 |
| (D) | Family Planning | (iv) | Non-steroidal oral Planning contraceptive |
Select the correct match from the following options:
