Fish and frog can respire in water. Can they respire through their skin? If yes, why do they have gills?

Why do animals in cold regions have a layer of fat below their skin.

Rate of water absorption can be increase through ........

complete the paragraph by choosing the appropriate words given in the brackets : Class Amphibia consist of animals which are strictly ......... only during their larval stages.At that time they breathe through their ..........Tadpoles are such stages which later ......... to form adult frog. Adult frog respires with the help of ................... when in water and with .................. when on land. Thus, it is a true .......... For performing cutaneous respiration, i.e. respiration through skin, they lack .......... in any form. The skin is also kept moist by staying near the water bodies. Amphibians do not have a ......... but eyes are bulging and prominent, this solves the problems of vision.

Paragraph based question: Read the following paragraph and answer the question based on it. Many waste materials are generated through the various daily human activities. This is called solid waste. If these waste materials are properly disposed of, they can be valuable source of energy. Currently, solid waste is a serious world wide problem as it causes both water and soil pollution. Solid waste is also serious problme from the point of view of economic growth, environment degradation and health. It has posed a serious threat to nature and human habitat because of the air, water and soil pollution it causes. Solid waste generated in the main metro cities of the state is approximately as follows-Mumbai: 500 tons, Pune: 1700 tons, Nagpur : 900 tons. When can be the wastes become valuable source of energy?

Paragraph based question: Read the following paragraph and answer the question based on it. Many waste materials are generated through the various daily human activities. This is called solid waste. If these waste materials are properly disposed of, they can be valuable source of energy. Currently, solid waste is a serious world wide problem as it causes both water and soil pollution. Solid waste is also serious problem from the point of view of economic growth, environment degradation and health. It has posed a serious threat to nature and human habitat because of the air, water and soil pollution it causes. Solid waste generated in the main metro cities of the state is approximately as follows-Mumbai: 500 tons, Pune: 1700 tons, Nagpur : 900 tons. Who creates solid wastes and how is it created?

Paragraph based question: Read the following paragraph and answer the question based on it. Many waste materials are generated through the various daily human activities. This is called solid waste. If these waste materials are properly disposed of, they can be valuable source of energy. Currently, solid waste is a serious world wide problem as it causes both water and soil pollution. Solid waste is also serious problme from the point of view of economic growth, environment degradation and health. It has posed a serious threat to nature and human habitat because of the air, water and soil pollution it causes. Solid waste generated in the main metro cities of the state is approximately as follows-Mumbai: 500 tons, Pune: 1700 tons, Nagpur : 900 tons. Which city of maharashtra generates highest amount of solid waste?

Paragraph based question: Read the following paragraph and answer the question based on it. Many waste materials are generated through the various daily human activities. This is called solid waste. If these waste materials are properly disposed of, they can be valuable source of energy. Currently, solid waste is a serious world wide problem as it causes both water and soil pollution. Solid waste is also serious problem from the point of view of economic growth, environment degradation and health. It has posed a serious threat to nature and human habitat because of the air, water and soil pollution it causes. Solid waste generated in the main metro cities of the state is approximately as follows-Mumbai: 500 tons, Pune: 1700 tons, Nagpur : 900 tons. How does solid waste pose serious threat to human habitats?

Paragraph based question: Read the following paragraph and answer the question based on it. Many waste materials are generated through the various daily human activities. This is called solid waste. If these waste materials are properly disposed of, they can be valuable source of energy. Currently, solid waste is a serious world wide problem as it causes both water and soil pollution. Solid waste is also serious problme from the point of view of economic growth, environment degradation and health. It has posed a serious threat to nature and human habitat because of the air, water and soil pollution it causes. Solid waste generated in the main metro cities of the state is approximately as follows-Mumbai: 500 tons, Pune: 1700 tons, Nagpur : 900 tons. From which viewpoint is solid waste a serious problem?

Try this. Take a suitable glass vessel like conical flask or beaker.Add some garden soil in it and sow some pulse grains in it in such away that you can observe them through glass. Water it every day and record the changes.

A magnifying glass of focal length 10 cms is used to read letters of thickness 0.5 mm held 8 cm away from the lens. Calculate the image size. How big will the letters appear? Can you read the lettersif held 5 cms away from the lens? If yes what size would they appear. If No, why not.