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प्रश्न
Answer the following question.
What is meant by contraception?
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उत्तर
Contraception includes methods or ways to prevent fertilisation and pregnancy in a fertile female as a result of successful copulation between a fertile male and female.
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संबंधित प्रश्न
What do you think is the significance of reproductive health in a society?
What are the measures one has to take to prevent from contracting STDs?
What is the causative organism for Gonorrhoea?
Name one method of contraception which also protects against sexually transmitted diseases.
Name the contraceptive device used by human females which is put over the cervix.
How does copper-T prevent pregnancy?
What is the name of surgical method of birth control (or preventing pregnancy) which is carried out in women?
List four ways of preventing pregnancy. State two advantages of using such preventive methods.
Which one amongst the following is the first country in the world to initiate action plans and programmes at a national level to attain total reproductive health as social goal?
First or free milk is called ______.
Which of the following method of contraception protects from acquiring sexually transmitted diseases?
There is a greater possibility for the evolution of a new species in organisms which reproduce by ______
Explain how, offspring and parents of organisms reproducing sexually have the same number of chromosomes?
Colonies of yeast fail to multiply in water, but multiply in sugar solution. Give one reason for this.
From the internet, gather information about the chromosome numbers of five animals and five plants. Correlate the number with the size of organism and answer the following questions.
- Do larger organisms have more number of chromosomes/cells?
- Can organism with fewer chromosomes reproduce more easily than organisms with more number of chromosomes?
- More the number of chromosomes/cells greater is the DNA content. Justify.
In the following figure, mark the positions of the endocrine glands which release the hormones that:
- control the release of sex hormone
- are responsible for the secondary sexual characters in boys.
- prevent diabetes.
- maintain the correct salt balance in the blood.
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?
______ is responsible for the declining female: male ratio.
