Study-1. A forest that is rich in biodiversity seems to decline in animal population. The government declared it as a biodiversity hotspot and the forest regained its species richness in few years. Study-2. A lake that is rich in marine fishes seems to decline in its species population due to overexploitation. A wise man in the area decided to worship the lake. The species population f the lake again became normal.
(a) Which values are been promoted in the above studies.
(b) Suggest some ways by which you can contribute to this concern.
(c) What would be the effect if the forest was not declared hotspot?

You find that a lake in your neighboring area has been covered by Water hyacinth. You have contacted your friends to remove this weed. Nobody agrees to support you. How will you explain the necessity of this?

Recently it was revealed that poaching of animals in their areas. How does it affect the ecosystem?

A large area of farmland in our country is facing the problem of less soil fertility. According to you which aspect of ecosystem helps us and how?

In a village Two friend farmers Ramnath and Kishan are cultivating normal cotton saplings. Every year they suffer and get fewer yields and lose money. One day Kishan watches add in television on Bt Cotton and encourages his fellow farmer, they were surprised by seeing high yield. Based on this, answer the following.
a) What is Bt cotton?
b) What way Bt kills lepidopteron, coleopterans and dipterans in the soil?
c) How could the information passed on to the farmers? What is the value that a fellow farmers can learn from this?

Gel Electrophoresis a Technique used to separate DNA fragments after the function of Endonuclease. Sushi couldn’t understand the actual function of Restriction Endonuclease. He takes the help of his friend sham by asking the questions. On the basis answer the following.
a) What is the difference between Exonuclease and Endonuclease?
b) Why sham did help his friend Sushi?
c) How can we see DNA fragments after the separation?

Pushpender is a scientist working on GMOs to produce Transgenic Buffaloes which can produce milk of medicinal properties. But he also found adverse effects on which they reduce their life span. Based on this, Answer the following.
a) What values are being neglected by him?
b) Should he continue with transgenic production of Buffaloes?
c) What Reactions and Reflections would he face from various organizations?

Prabha has seen huge garbage dumps outside your school which are not being regularly disposed of by MCD / Nagar Parishad. Prabha discusses the problems with school mates and decide to organize rally to spread awareness among local people about public hygiene.
A. Prepare two slogans for rally
B. Name any two infectious diseases which may spread due to such unhygienic conditionsat public place

Municipal Corporation has deputed personnel to check for mosquito breeding in your school.
a) Which are the places they should check for mosquitoes and there larvae?
b) Name to diseases which are spread by mosquitoes.
c) Name any two biological agents which can be used to control mosquitoes

How micro-propagation is helpful in producing thousands of plant?

How would an aquaculture and pisciculture be helpful in our life?

Write the economic importance of honey bee.

What role is played by heterozygosity in the improvement of breeds?

Health is the basic to life, and is essential for the good results in any sphere of life. A factory owner cannot expect the optimum output, if he does not employ healthy workers. A farmer cannot get optimum yield in his fields, if he is not healthy What does health actually mean? How is it related to our personal life & professional efficiency?

Some human diseases are transmitted only when the blood of a patient comes in contact with the blood of a healthy person. In one of such disease, there is a progressive decrease in the number of lymphocytes of the patient.
i) Name the disease & its causative agent
ii) Name the type of lymphocytes affected due to this infection.

Some international sports persons failed in dope tests& not allowed to participate in Olympics as they were drug abusers
i) Name the drugs that would have been taken by them.
ii) Why did they use such drugs?

Penicillin was once called wonder drug as it could heal most of the bacterial infections. It is no longer used now. Suggest the possible reasons for this.

Sometimes Gene flow or Gene migration is harmful for a population why?

A woman is tortured by in-laws as she gave birth to female child every time. They forced her to determine the sex of the foetus.
(a) What do they do?
(b) Who is responsible for the sex of the child – mother/ father?
(c)Is the behavior of in-laws towards her right or wrong? Give your opinion.

A pregnant woman gets developed some rashes on her skin. Thinking of allergy, she took some medicines without consulting any doctor.
a) Give a technical term to the agents which may cause malformation in the foetus.
b) Give suggestions, what should that pregnant woman do in such condition?
c) Which fluid in the uterus can be used to detect any abnormalities in the foetal development?

Ram is a person of age 42 years old living in a village of Assam. His house is surrounded by a number of bamboo trees but he could not see any flower on them until now. What can be the explanation of his observation? How does bamboo reproduce?

Raju’s younger sister has seen a banana tree in backyard of a house. She could see the fruits but no seeds. She wants to know how a new plant of banana will be produced without seed. What will you explain to your sister?

What is interspecific hybridization? Write one example of it.

In the daily Tribune dt. August 20, 2012 there was a news under heading 'New Stem Cell treatement to cure cancer'. Professor Revenue head of bone marrow transplantation at Israel's Hadassah' Medical Centre in Jerusalem said: The technique uses specialised harvested cells to produce infection - fighting bone marrow. Patients with blood cancers have most of their bone marrow destroyed when given radiation or chemotherapy to destroy their disease.
(i) What are stem cells?
(ii) What is the source of stem cells?
(iii) What are the infection - fighting cells produced by bone marrow?
(iv) Name the diseases which can be curved by this life saving treatements.
(v) What is the effect of bone marrow transplantation?

(i) Name two genetically engineered recombinant proteins used for treatement of specific disorders.
(ii) Name a substance produced by certain bacteria used in blood transfusion.
(iii) Who is credited with synthesis og gene.