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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
Mention the problems that are taken care of by reproduction and child health care programme.
Amniocentesis for sex determination is banned in our country. Is this ban necessary? Comment.
Name one sexually transmitted disease for which no definite cure has been found so far. What is the causative organism of this disease?
Name the contraceptive device used by the human males which acts as a sheath over the male organ and traps the sperms in it.
What is done in the contraception method known as tubectomy?
Which of the following method of contraception protects a person from acquiring a sexually transmitted disease?
(a) oral pills
(b) condom
(c) copper-T
(d) surgery
A woman uses a device X made of a common metal for preventing pregnancy. This device works by preventing the implantation of fertilised egg cell (or embryo) in the female organ Y.
(a) What are the two names of device X?
(b) Name the organ Y.
(c) Can this method of contraception protect a woman from acquiring a STD?
A, B and C are three common STDs. A and C are caused by bacteria whereas B is caused by a virus D. The virus D reduces the immunity of the infected person to such a low level that the person can die of even very mild diseases.
(a) What could A and C be?
(b) What is B?
(c) Name the virus D?
(d) How can A, B and C be caused?
(e) Out of A, B and C, which one does not have a definite cure as yet?
What are Sexually Transitted Diseases (STD)? List two viral and two bacterial STDs.
Give scientific reasons.
Indians should follow family planning for controlling the population.
Write any two Sexually transmitted diseases.
The technique which makes use of amniotic fluid for the detection of prenatal disorder is called as ______.
Which of the following method of contraception protects from acquiring sexually transmitted diseases?
Colonies of yeast fail to multiply in water, but multiply in sugar solution. Give one reason for this.
Would a Planaria cut vertically into two halves regenerate into two individuals? Complete Figure D and E by indicating the regenerated regions.
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| A | B | C | D | E |
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?
Select the statement(s) that relate to reproductive health:
In India, the action plans for family planning were initiated in the year ______
Sex education should involve all of the following except:
What was the primary purpose of enacting the PNDT Act in 1994?
