artificial system

The earliest attempt towards classification of living organisms is seen in the works of many ancient philosophers in Greek and India. The information available from many ancient scriptures of our country indicates the attempts made by Indians towards classification of plants and animals. An ancient..

There have been several attempts to classify angiosperms, the flowering plants. One of the earliest attempts in this direction was that of Carolus Linnaeus. He attempted a classification of angiosperms based on the characteristics related to flowers. Subsequent taxonomists also have found that flor..

, the famous Greek philosopher (384 to 322 B.C.) had identified different types of plants and animals. Apart from this, he described some organisms under an intermediate group indicating that such organisms could be placed neither under plants nor under animals. He tried to classify the organisms..

Summary - Biologists estimate that there are about 30 million species of living organisms inhabiting this biosphere and only a million and half of it have been discovered and described so far. The species of plants and animals identified so far exhibit a great deal of variation in their form, struc..

Prosthetic Cardiac Pacemaker - The sinoatrial node, known as SA node is located in the right atrial wall below the opening of the superior vena cava. The SA node initiates the cardiac cycle and sets the basic pace for the heart rate, hence called the pacemaker. If this normal and natural electrical..

. A signal traveling from west to east encounters the first hybrid coil, where part of the power enters the west-east amplifier by way of the centre taps on the main winding..

. Therefore we need to convert DC to AC before using any appliance and thus it increases the cost of such solar panels as the sources of electricity. Uses of Solar Cells Solar cells or solar cell panels are used in - Artificial satellites and in space probes like Mars orbiters Wireless tr..

>Commercially, one of the major roles of auxins is in parthenocarpy, that involves production of seedless fruits. Gibberellins are concerned with cell elongation and cause bolting in rossette plants like cabbage. GA-3 (gibberellic acid), a gibberellin that has been most studied, is used in the brew..

. A good quality service can be continuously ensured by a global operational satellite system. Thus, communication satellites would give a valuable service in addition to the submarine cable and high frequency radio systems. Geostationary communication satellites have enabled no..

This consists of respiratory wastes, nitrogenous wastes and bile pigments The kidneys function as a pair of filters through which about one litre of blood circulates each minute. The entire blood in the body passes through them in 5 - 6 minutes. In a day it filters 1800 litres of blood which is ..