Science (English Medium) Class 12 - CBSE Question Bank Solutions

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.

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.

(a) "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.

(b) List any two 'indicators' that indicate a reproductively healthy society.

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.

Name the parts of an angiosperm flower in which development of male and female gametophyte take place.

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.

In which way has the study of biology helped us to control infectious diseases?

Our government has intentionally imposed strict conditions for M.T.P. in our country. Justify giving a reason.

List the three states the annuals and biennial angiosperms have to pass through during their life cycle.

By taking two examples explain how has bio-fortification helped in improving food quality.

In a flowering plant a microspore mother cell produces four male gametophytes while a megapore mother cell forms only one female gametophyte. Explain

Read the statement and answer the questions that follow.

A flower of brinjal has 520 ovules in its ovary. However, it produces a fruit with only 480 viable seeds.

(a) What could have prevented the rest of the 40 ovules from maturing into viable seeds? Explain giving a reason.

(b) Describe the development of a dicot embryo in a viable seed.

(c) Why certain angiospermic seed albuminous while others are exalbuminous? Explain.

A capsicum flower has 240 ovules in its ovary. But, it produces a fruit with only 180 viable seeds.
 

Name the following:  Any one inter-specific hybrid mammal.