During morning walk one day, Hemant asked his uncle, who was a plant pathologist, that he wanted to control plant pests as these were destroying his garden.But, he did not want to use chemicals due to their long-term harmful effect on the environment.His uncle suggested him to go for biological control methods.
Read the above passage and answer the following questions:
(i) What are biopesticides?
(ii) Name any biological control agent that helps to control mosquito larvae.
(iii) What value is displayed by Hemant?

Rahul was not getting a good yield from the fields but his neighbours used to apply fertilizers to get higher yields of different crops.He consulted an agricultural scientist, living in the neighbouring town, to suggest some cheap and eco-friendly method to boost crop production.The scientist suggested him to use biofertilizers.
(i) What are bio fertilisers?
(ii) Name two examples of bio fertilisers.
(iii) Why did scientist advise Rahul to use bio fertilisers?

Mohan's neighbour suffered from kidney failure and his life was in danger.Doctors advised him to get kidney transplanted immediately.His wife was willing to donate one of her kidneys but she was in dilemma due to low success rate as a result of the immune reaction.She expressed her fear to a doctor who removed her doubts by telling her about the availability of immunosuppressive agents.Read the above passage and answer the following questions:
(i) What are immunosuppressive agents?
(ii) Name one immunosuppressive agent and its source.
(iii) What value is displayed by doctor?

Protein is an important constituent of our food and its deficiency leads to many health problems.A large population of developing countries can not afford pulses.Ramesh learnt that many so he thought of culturing these microorganisms to provide a cheap source of proteins.
Read the above passage and answer the following questions:
(i) What are single cell protein (SCP)?
(ii) Name two microorganisms which provide SCP.
(iii) Why did Ramesh want to culture microorganisms?

During recent years many disease resistant crops plants have been released and many chemical pesticides have also been used to control the pest and diseases, so as to improve the agricultural yield. But such methods of pest and disease management have led to the development of 'super pests and super weeds' which require more scientific methods to control them
Answer the following questions on the basis of above information:
(i) Should we continue such a practice of pest and disease management?
(ii) What other method should be adopted to keep the pest and diseases at managable level so as to enhance the agricultural yield?
(iii) What value have not been kept in mind in the above case.