Using internet try to fine out some genetically modified organisms and GM foods. Prepare a note on the merits and demerits of GM foods.

Assertion : Organisations like GEAC are necessary to monitor GM researches and to test the safety of introducing GM organisms for public services Reason : GM researches can have unpredictable results which even can be disastrous when genetically modified organisms are introduced into the ecosystem.

Pond is a self-sustainable unit. Some organisms related to pond ecosystem are listend below tadpole, fish, water plants, kingfisher a. Construct a food chain with the listed organisms. b. Explain trophic level. c. Point out trophic level of each organism in the constructed food chain. d. Name interconnection of food chains in nature.

Study statement a-d (about organic farming) and find out the correct ones. (a) Utilises genetically modified crops like Bt cotton (b) Uses only naturally produced input like compost (c) Does not use pesticide and urea (d) Produces vegetables rich in vitamins and minerals

Which of the following statements regarding the disease typhoid is/are correct ? (i) Salmonella typhi are the pathogenic bacteria which enter human intestine through contaminated food and water migrate to other organs through blood. (ii) Sustained high fever (39^(@)C " to " 40^(@)C) , weakness, stomach pain, constipation, headache and loss of appetite are some common symptons of typhoid. (iii) Widal test is used for diagnosis of typhoid fever. (iv) The patient of this disease is not required to be treated with antibiotics.