Science (English Medium) इयत्ता १२ - CBSE Question Bank Solutions

What is secondary metabolism?

Diseases like dysentery, cholera, typhoid etc., are more common in overcrowded human settlements. Why?

What are three options to increase food production? Discuss each giving the salient features, merits and demerits.

A patient was advised to have a kidney transplant. To suppress the immune reaction, the doctor would administer him ______.

Mention the problems that are taken care of by reproduction and child health care programme.

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.

Identify ‘a’ and ‘b’ in the figure given below representing proportionate number of major vertebrate taxa.

Name the enzyme and state its property that is responsible for continuous and discontinuous replication of the two strands of a DNA molecule

Name the type of biodiversity represented by the following:

50,000 different strains of rice in India.

Mention the kind of biodiversity of more than a thousand varieties of mangoes in India represent. How is it possible?

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.

1. “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.
2. List any two ‘indicators’ that indicate a reproductively healthy society.

Since October 02, 2014 “Swachh Bharat Abhiyan” has been launched in our country.

1. Write your views on this initiative giving justification.
2. As a biologist name two problems that you may face while implementing the programme in your locality.
3. Suggest two remedial methods to overcome these problems.

If implementation of better techniques and new strategies are required to provide more efficient care and assistance to people, then why is there a statutory ban on amniocentesis? Write the use of this technique and give reason to justify the ban.

What do you think is the significance of reproductive health in a society?

Suggest the aspects of reproductive health which need to be given special attention in the present scenario.

Is sex education necessary in schools? Why?

Do you think that reproductive health in our country has improved in the past 50 years? If yes, mention some such areas of improvement.

Amniocentesis for sex determination is banned in our country. Is this ban necessary? Comment.

What are the measures one has to take to prevent from contracting STDs?

State True/False with explanation.

Creating awareness about sex-related aspects is an effective method to improve reproductive health of the people.