american political science association

Associated with the sieve tube is a small cell containing dense cytoplasm and a large elongated nucleu..

Electrons revolve around the nucleus in different energy levels or shells and each shell is associated with definite energ..

Apart from the lungs, there are several associated organs and structures which together form the respiratory system. The respiratory system is closely linked with the circulatory system as the transport of the gases takes place through bloo..

It is the potential energy associated with water. For example, water at a height has more water potential and will, therefore, flow down. When water is present in a dilute solution it has higher potential and will therefore move towards the concentrated soluti..

The physical movements associated with the gaseous exchange are called breathing. They are controlled by the respiratory centre of the medulla oblongata in the human brain. Thus, the breathing movements are involuntary to a large extent. However, we can control the rate of breathing and ..

Liver is the largest gland and is found in the upper part of the abdomen on the right side of the body just below the diaphragm. Its secretion is called bile juice. It is alkaline and rich in organic salts called the bile salts. The alkaline nature serves to neutralize the acidic pH of the gastric..

It is the largest part of the brain and is made up of two hemispheres called the cerebral hemispheres. The two hemispheres are joined together by a thick band of fibres called the corpus callosum . The cerebrum is made up of four distinct lobes - frontal, parietal, temporal and occipetal. The out..

Chemical Properties of Carbon Compounds - Most of the carbon-containing compounds associated with hydrogen i.e., hydrocarbons are fuels that produce heat on burning. Petroleum products like natural gas, petrol, diesel, kerosene, heavy oils etc., and in a larger sense, wood, biogas, charco..

Fullerenes are allotropes of carbon that were discovered as recently as 1985. They have been found to exist in the interstellar dust as well as in geological formations on earth. They are large cage like spherical molecules with formulae C 32 , C 50 C 60 , C 70 , C 76 , C 84 etc. The most common..

. But it was the American inventor, Benjamin Franklin (1706 - 1796) who experimented with electricity and made major inroads in understanding the phenomenon. By the middle of the eighteenth century, there were machines that could generate large electrical charges. Static electricity may p..