school system

Root is the descending portion of the axis of the plant. It is not normally green in colour. It is characterised by the absence of nodes and internode..

Shoot is the ascending portion of the axis and develops from the plumule of the embryo. It consists of the main axis or stem, branches and leaves. The stem is provided with nodes and internodes which may not be distinct in all cases. Leaves and branches develop from the nodes. The portion between t..

The aorta or the great artery arising from the left ventricle takes the oxygenated blood to the body organs through a number of arteries. From these organs, the deoxygenated blood is collected by the superior and inferior vena cava and brought back to the right auricle. The right auricle pumps the ..

pH plays a very significant role in biochemical reactions. For example, the blood in our bodies is buffered at a pH value of 7.36-7.42 due to bicarbonate - carbonic acid buffer. A mere change of 0.2 pH units can cause death. Certain enzymes get activated only at certain definite pH value..

The concept of information is central to communication. There is no precise definition of the word "information". So, instead of information, we deal with "message..

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