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प्रश्न
Draw a well labelled diagram of L.S. human testis.
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उत्तर १
उत्तर २
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संबंधित प्रश्न
Your school has been selected by the Department of Education to organize and host an interschool seminar on “Reproductive Health – Problems and Practices”. However, many parents are reluctant to permit their wards to attend it. Their argument is that the topic is “too embarrassing.” Put forth four arguments with appropriate reasons and explanation to justify the topic to be very essential and timely.
Reproductive and Child Healthcare (RCH) programmes are currently in operation. One of the major tasks of these programmes is to create awareness amongst people about the wide range of reproduction related aspects. As this is important and essential for building a reproductively healthy society.
- “Providing sex education in schools in one of the ways to meet this goal.” Give four points in support of your opinion regarding this statement.
- List any two ‘indicators’ that indicate a reproductively healthy society.
What are the measures one has to take to prevent from contracting STDs?
What is amniocentesis and why there is a statutory ban on it?
What does IUCD indicate?
Write the full form of the following as it occur in biology :
STD
Name one method of contraception which also protects against sexually transmitted diseases.
Give two examples of sexually transmitted diseases.
What substances are contained in oral pills, used as contraceptives? How do they work?
The sexually transmitted disease which is caused by bacteria is :
(a) malaria
(b) diarrhoea
(c) gonorrhoea
(d) AIDS
In the surgical method of birth control available for human females, the structures P in the reproductive system are cut and ligated (tied up) properly at both ends. This prevents the reproductive cell Q released by an organ R from entering the structures P so that Q is not available to fuse with another reproductive cell S coming from the male reproductive system. In this way, pregnancy is prevented.
(a) What are structures P?
(b) What is cell Q?
(c) Name the organ R.
(d) What is the reproductive cell S?
(e) What is the name of this surgical method of birth control available to females?
Give the role of amniocentesis.
Name the kind of diseases/disorders and any two symptoms that are likely to occur in humans if Mutation in the gene that codes for an enzyme phenylalanine hydroxylase occurs.
‘Saheli’ a new oral contraceptive developed by ______.
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 |
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.
Where was "Saheli" developed?
Comment on the Reproductive and Child Health Care programme of the government to improve the reproductive health of the people.
Amniocentesis technique is ______.
