Question
Write short notes on:
Polio.
Write short notes on:
Polio.
Polio: Poliomyelitis or polio is a disease of the nervous system caused by one of the smallest known virus, called polio virus. The virus enters the body through the food and water and reaches the intestine and from there it enters the CNS or central nervous system via blood stream and lymphatic systems. Children between the age of 6 months to 3 years are most prone to polio infection. Polio is transmitted among children by the faeco-oral route and through the direct contact, dirty hands, contaminated food or milk and flies. The early symptoms of the polio disease are sore throat and headache.
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Double Matching:
Match the columns I, II and III.
| | Column I | | Column II | | Column III |
| 1. | Oil seeds | a. | Red Sindhi | i. | Sahiwal |
| 2. | Intercropping | b. | Mustard | ii. | Sunflower |
| 3. | Local breeds | c. | Vitamin A | iii. | Maize |
| 4. | Poultry feed | d. | Soybean | iv. | Vitamin K |
Name the plant tissue which show the following features?
Explain by an example what is meant by potential energy. Write down the expression for gravitational potential energy of a body of mass m placed at a height h above the surface of the earth.
What is the advantage of using insect resistant varieties?