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  Insecticide  The poisonous   substance which are used to kill harmful insect called insecticides. The insects harm the crops, domestic animal and human being. So they are killed by using insecticide. insecticide can be categorized into two ways: 1. Organic insecticides 2. Inorganic insecticides 1. Organic insecticides  Organic insecticide as the synthetic compound which is composed of carbon-hydrogen, Oxygen, and other elements. There are three types of organic insecticides.  They are: A. Chlorinated organic insecticide   These compound contain chlorine is an additional element.  These compounds are stable and have a long term effect. for example, aldrin, dieldrin B. Organophosphate insecticide:   The organic insecticide that contains Phosphorus as an additional element is called organophosphate insecticides.  This insecticide is less stable, degradable and highly toxic to other animals, for example malathio...

FUNCTION OF BLOOD COMPONENT  Lymphocyte : It kills the germs of the disease. Fibrinogen : It helps in blood clotting during injuries and wounds. Globulin : It increases immunity. Pericardial fluid : It protects the heart from external pressure and injuries. Right auricle : It collects impuries blood. Left auricle : It collects pure blood. Right ventricle : It sends impure blood to the lungs. Left ventricle : It transmit pure blood to all part of the body. Valve : It helps to flow the blood in the right direction. Tricuspid Valve : It transmits blood from the right auricle to right ventricle and stops the opposite flow of the blood Bicuspid Valve : It transmits blood from the left auricle to left ventricle and does not allow the opposite flow of the blood Pulmonic Valve : It sends blood from the right ventricle of the heart to pulmonary arteries. Aortic Valve : It sends blood from left ventricle of the heart to aorta Aorta : It transmits pure blood from the left v...

CAUSES, EFFECT AND CONTROL MEASURE OF AIR POLLUTION, WATER POLLUTION AND LAND POLLUTION Causes of air pollution * Excessive smoke from vehicle *Smoke and dusts from cities *Improper disposal of household wastages *harmful rays emitted from radioactive element *Gases from volcano, fire etc Effect of air pollution * Problem in vision * Greenhouse effect * Problem in growth of plants * Negative effect in human health * Destruction of ozone layer * Climate change * Acid rain * Deterioration of historical monuments Control measure of air pollution *Reduce population growth *Removing factories and industries from residential area and establishing them far from residential     area *Use of tall and managed chimney in factories and industries *Increase the use and development of alternative sources instead of fossil fuels *Decrease the production of air polluting gases *Conduct afforestation programs and conservation of trees  *Increase in pu...

1.   Write the name of two radioactive elements. Ans: The name of two radioactive elements is:                                                                                                                                                      a...