Anything in the environment which can be used is called a natural resource. Natural Resources includes total natural environment that support human life and contribute to the production of necessities and comforts to mankind. So natural resources are the components of atmosphere, hydrosphere and lithosphere. Types of Natural Resources: On the Read more…
SHORT ANSWER TYPE QUESTION[II] [3 Marks] -Year 2007 Question 1.Suggest three ways to maintain a balance between environment and development to survive. [Delhi] Answer. The three ways to maintain a balance between environment and development to survive are as follows: Forest resources should be used in an environment friendly and developmentally Read more…
SHORT ANSWER TYPE QUESTION[II] [3 Marks] – Year 2007 1. (a) What is ‘environmental pollution’? (b) Distinguish between biodegradable and non-biodegradable pollutants. (c) Choose the biodegradable pollutants from the list given below: Sewage, DDT, radioactive waste, agricultural waste. [Delhi] Answer. (a) Environmental pollution is an undesirable change in the physical, chemical Read more…
Question-1 Define nutrition? What are the different modes of nutrition? Solution: Nutrition is the process of intake, as well as utilization of nutrients by an organism. The different modes of nutrition are saprophytic nutrition, parasitic nutrition and holozoic nutrition. Question-2 What is the mode of nutrition in fungi? Solution: Saprophytic Read more…
Short Answer Type Questions[l] [2 Marks] -Year 2015 1.What are enzymes? Name any one enzyme of our digestive system and write its function. Answer. Enzymes are biological catalysts. Catalysts are proteins that increase the rate of chemical reactions without being used up. For example: Amylase catalyses the breakdown of starch into Read more…