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Need for Preservation - Plants and animals occupy diverse habitats. It becomes practically impossible for a biologist to study each and every plant or animal species in its natural habitat. Hence, over the years attempts have been made to preserve the plant species or animal species in a ..

Plants and animals occupy diverse habitats. It becomes practically impossible for a biologist to study each and every plant or animal species in its natural habitat. Hence, over the years attempts have been made to preserve the plant species or animal species in a simulated natural condition, by ma..

Need for Bonding - Chemical bonding is like a glue that binds atoms together. And what goes into making that glue? Only electrons. Not all electrons make up the glue, it is only the valence electrons. Valence electrons are the outermost electrons [electrons in the last shell]. Let us take..

Need for Classification - More than a million species of living organisms have been discovered and described so far and a large number of them are yet to be discovered. Scientists involved in this task, called taxonomists, estimate that there may be around 30 million species of living org..

More than a million species of living organisms have been discovered and described so far and a large number of them are yet to be discovered. Scientists involved in this task, called taxonomists, estimate that there may be around 30 million species of living organisms of which the known number of ..

More than a million species of living organisms have been discovered and described so far and a large number of them are yet to be discovered. Scientists involved in this task, called taxonomists, estimate that there may be around 30 million species of living organisms of which the known numb..

Chemical bonding is like a glue that binds atoms together. And what goes into making that glue? Only electrons. Not all electrons make up the glue, it is only the valence electrons. Valence electrons are the outermost electrons [electrons in the last shell..

The wireless signal consists of radio frequency (high frequency) carrier wave modulated by audio frequency (low frequency). The diaphragm of a telephone receiver or a loud speaker cannot vibrate with high frequency. Moreover, this frequency is beyond the audible range of human ear. So, it is neces..

Need for Studying Biology - What is the need for studying Biology? The study of Biology becomes important for the following reasons: It brings about an awareness of the rich diversity of life forms that inhabit the Planet Earth It helps us to know and appreciate the pr..

Which of the following is needed to draw a triangle? => four collinear points or three non-collinear points or two non-collinear points or three collinear points..