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Radio Carbon Dating
. As there is a natural plant-animal cycle, an equilibrium is set up and all living matter contains the same small proportion of 1 4 C as it occurs in the atmosphere. Once the plant or animal dies, the uptake of CO 2 by it ceases and the level of 1 4 C in the dead begins to fall due to the decay, w..
a) Family formations
Purpose of reproduction leads to the formation of groups of individuals, called a family, which is an instinct of individuals of different sexes of a species. However, grouping behaviour varies from one species to another. i) Some animals are solitary and lead more an independent li..
Electricity, its Heating, Chemical and Magnetic Effects
Appliances used in our day to day life are based on the principles of electricity and magnetism. Electricity is one of the most important sources of energy. Lights, fans, motors, radios and television are some common appliances which work on electricit..
Electricity, Heating, Magnetic Effects
Introduction - Appliances used in our day to day life are based on the principles of electricity and magnetism. Electricity is one of the most important sources of energy. Lights, fans, motors, radios and television are some common appliances which work on electricit..
A Christmas Carol - A Play
A Christmas Carol - 'A Christmas Carol' is a one-act play that is supposed to be 'enacted' over the radio. So, the play depends largely on the language and the sounds. Scrooge is a miser. He makes his clerk, Bob Cratchit work hard for him, but pays him very less. In fact, he hates giving ..
Chromosomes
Chromosomes (chroma = colour, soma = body) are tiny thread-like structures found in the nucleus of a cell. In a non-dividing cell they appear as a chromatin network while during cell division they become condensed to form short and thick chromosomes. Chromosomes are unique cell stru..
Occurrence
Astatine the last member of halogen family is a radioactive element with a very short life. All other halogens are abundant in nature in the combined state. The very high electronegativities of halogens make them very reactive and hence, they are not found in free stat..
Telophase
At each pole, the gathering chromosomes become less distinct as they merge into a network The nucleolus reappears at each pole. A newly formed nuclear membrane encloses the chromatin network. Thus two daughter nuclei are formed. The number of chromosomes in each daughter nucleus..
At each pole, the gathering chromosomes become less distinct as they merge into a network The nucleolus reappears at each pole. A newly formed nuclear membrane encloses the chromatin network. Thus two daughter nuclei are formed. The number of chromosomes in each daughter nucleus..Background Radiation
In astronomy, the low temperature microwave radiation that arrives at the earth's surface from all directions of outer space is called background radiation. It is so named because it forms a background to all the radio sources that have been detected by radio telescopes. Cosmic ..
Background Radiation
Background Radiation - In astronomy, the low temperature microwave radiation that arrives at the earth's surface from all directions of outer space is called background radiation. It is so named because it forms a background to all the radio sources that have been detected by radio..
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