21. Health and Diseases I. Choose the Correct Answer. 1. Tobacco consumption is known to stimulate the secretion of adrenaline. The component causing this could be _______. (a) Nicotine (b) Tannic acid (c) Curcumin (d) Leptin. 2. World ‘No Tobacco Day’ is observed on: (a) May 31 (b) June 6 (c) April 22 (d) October 2 3. Cancer cells are more easily damaged by radiations than normal cells because they are _______. (a) Different in structure (b) Non-dividing (c) Mutated Cells (d) Undergoing rapid division. 4. Which type of cancer affects lymph nodes and spleen? (a) Carcinoma (b) Sarcoma (c) Leukemia (d) Lymphoma 5. Excessive consumption of alcohol leads to _______. (a) Loss of memory (b) Cirrhosis of liver (c) State of hallucination (d) Suppression of brain function. 6. Coronary heart disease is due to: (a) Streptococci bacteria (b) Inflammation of pericardium (c) Weakening of heart valves (d) Insufficient blood supply to heart muscles 7. Ca...

22. Environmental Management I. Fill in the blanks. 1. Deforestation leads to Reduction in rainfall. 2. Removal of soil particles from the land is called Soil erosion 3. Chipko movement is initiated against the cutting down of trees 4. Nilgiris is a biosphere reserve in Tamilnadu. 5. Tidal energy is Non-conventional or renewable type of energy. 6. Coal, petroleum and natural gas are called Fossil fuels. 7. Coal is the most commonly used fuel for the production of electricity. II. State whether True or False. If false, write the correct statement: 1. Biogas is a fossil fuel. Answer:            False Correct statement : Biogas is the mixture of methane, hydrogen sulphide, carbon-di-oxide and hydrogen. 2. Planting trees increase the groundwater level. Answer:            True 3. Habitat destruction caused loss of wildlife. Answer:     ...