ASSIGNMENT (Tutor Marked Assignment) Course Code: AHE-01 Assignment Code: AHE-01/TMA/ 2017 Maximum Marks: 100 1. Differentiate between the following pairs: (i) Toxic substance and hazardous substance (ii) Desert and Grassland (iii) Mutualism and Commensalism (iv) Family and Kingship (v) Perihelion orbital and aphelion orbital of the sun. (5×2=10) 2. Write short notes on the following : (i) Man made environment (ii) Pyramid of energy (iii) Causes of desertification due to human activities (iv) Water as an important Non-living resource (v) Environment (Protection) Act of India (4×5=20) 3. (a) What is a population histogram? What type of information can be obtained from the population histograms? (b) Describe the effects of air pollution on non biological systems. (5) (5) 4. (a) Discuss the positive and negative aspects of high yielding plant varieties. (b) Explain with the help of suitable examples the reasons for the occurrence of higher rate of mental illness in the city dwellers who have migrated from rural areas. (c) Explain briefly the concept of new global economic system. (4) (3) (3) 5. (a) Draw a well labeled diagram of the Nitrogen cycle. (b) Describe the steps involved in the primary and secondary treatment of sewage water in order to make it suitable for drinking purpose. (5) (5) 6. (a) Describe the measures that are used to rehabilitate degraded land. (b) Differentiate between waste reuse and waste recycling. (c) Write the name of the potential alternative products that can be produced from the following crop residues: (i) Cashew apple – (ii) Cotton leaves – (iii) Sorghum sticks, sugar cane trash – (4) (3) (3) 4 7. (a) Discuss the effects of radiation on human health. (b) Write the three main criteria that are used as the index of the development of a country. (c) Describe the role of Non-Governmental agencies in India, in the protection and management of the environment. (4) (3) (4) 8. (a) List the reasons for extinction of Wild Life and discuss any one reason. (b) Describe the various modes of transmission of communicable diseases. (5) (5) 9. (a) Describe the water quality standards as specified by Central Pollution Control Board (CPCB) of India in 1979. (b) What are the three important ways in which voluntary agencies help the Government in environmental education. (c) Describe the efforts by the Nepal Government in protecting its environment.