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?

A debate was conducted on school on the need to conserve biodiversity. One student felt. that there are so many species on the earth, why will it matter if we lose a few. Do you feel the same. Justify your answer.

A sudden decline in fruits and seeds were seen in an area where regular heavy use of insecticides was done for the past few years. Give reasons for such an outcome.

Students were taken for excursion to Arabari Joint forestry Project in Midnapore district, West Bengal .The various observations done by the students were as follows
(i) Village people using forest products without causing harm to forest.
(ii) Village people helping in plantation in deforestation areas.
(iii) A core area under the forest is not disturbed by anybody. State the various inference which the students draw from the observations

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?

Now a day’s animals are coming out of the forest and create problems in the nearby areas. Give the possible reasons.

Jevan’s friend’s uncle suffers from reduced body weight loss. He suspects HIV. He wants to diagnose immediately. But due to shy he delays to meet doctor. One day Jevan came to know and advices him to go for ELISA or PCR Test. Based on these answer the following questions?
a) What are ELISA and PCR?
b) What makes Jevons uncle feel shy to meet doctor?
c) What are the steps involved in PCR?

Genes encoding resistance to antibiotics like Ampicillin, chloramphenicol, tetracycline are useful selectable markers for E.coli. The normal E.coli cells do not carry resistance against any of these antibiotics. Ankita wants to know more clarity on these scriptures. She asks doubts to her teacher. Based on this please answer the following.
a) Name the best known plasmid vector?
b) What are selectable markers?
c) On what basis Biology teacher advices Ankita.

Sandeep is a Biology Student of class xii. He learnt from his teacher that lack of insulin hormone in our body can be injected through syringes. One day his father shows symptoms of Diabetics and he suggested him to meat doctor for Diagnosing Insulin product. On the basis, Answer the following questions.
a) What did Sandeep understands about insulin?
b) On what basis did Sandeep advice his father?
c) Which American based company produced insulin at first and in which year?

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

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.

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?

Two claimant fathers filed a case against a lady claiming to be the father of her only daughter. How could this case be settled identifying the real biological father?

A child born to a couple was claimed by another man in the hospital. What is the methodology used to solve the paternity dispute?

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?

A mother gives birth to a baby. Soon after delivery, the mother-in-law insists of giving water and honey to the new born. But the father of the baby opposed this decision and took the baby to the mother of the newborn, so that the baby gets the first milk.
a) What is the milk called which comes out of the mammary gland of the mother during the initial days of lactation? What is its significance?
b) What value can you find in the father of the baby?
c) Name the hormones which influence lactation.

There are two person A & B living in the ONGC colony Siva nagar,  they are neighbor and planted bottle gourd plant in their garden but the plant of person A bears fruits while plant of Mr. B has no fruit at all. Although the physical condition same for both. What will be your explanation to them?

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.