Industrial Pollution and Environmental Degradation Although industries contribute significantly to India's economic growth and development, the increase in pollution of land, water, air, noise and resulting degradation of environment that...
India is one of the ancient civilisations in the world. It has achieved multi-faceted socio- economic progress during the last five decades. It has moved forward displaying remarkable progress in...
10.1 Introduction You have studied in Class IX that a circle is a collection of all points in a plane which are at a constant distance (radius) from a fixed...
The detailed structure of the membrane was studied only after the advent of the electron microscope in the 1950s. Meanwhile, chemical studies on the cell membrane, especially in human red...
James Dewey Watson was born in Chicago on 6 April 1928. In 1947, he received B.Sc. degree in Zoology. During these years his interest in bird-watching had matured into a...
Camillo Golgi (1898) first observed densely stained reticular structures near the nucleus.These were later named Golgi bodies after him.They consist of many lat, disc-shaped sacs or cisternae of 0.5ìm to...
In fact, there is no real ‘progress’ in the idea of evolution. Evolution is simply the generation of diversity and the shaping of the diversity by environmental selection. The only...
You may recall that the interphase nucleus has a loose and indistinct network of nucleoprotein fibres called chromatin. But during different stages of cell division, cells show structured chromosomes in...
Those students who are studying in class 6th, 7th, 8th, 9th, 10th, 11th and 12th can check the important topics, question paper and notes from the links given on this...
The periodic table of elements is one of the most important tools for chemists and students of chemistry. It is a chart that organizes the elements based on their properties...