Indian Institute of Public Administration, New Delhi
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TIDEL Park, Chennai - Civil Engineer
Tidel Park, 4, Rajiv Gandhi Salai, Taramai, Chennai 600 113
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TNPSC GROUP - I QUESTIONS 1 -6
tnpsc group 1 2012 qualification
New START (for Strategic Arms Reduction Treaty)
New START (for Strategic Arms Reduction Treaty) is a nuclear arms reduction treaty between the United States of America and the Russian Federation with the formal name of Measures for the Further Reduction and Limitation of Strategic Offensive Arms. It was signed on 8 April 2010 in Prague, and, after ratification, entered into force on 5 February 2011. It is expected to last at least until 2021. New START replaced the Treaty of Moscow (SORT), which was due to expire in December 2012.
Tissue Culture
Tissue culture is a technique applied to grow the tissues of plants and animals by in vitro culture. ‘In vitro’ culture means culturing the tissues outside the body of living organisms i.e. in the laboratory.
Plant tissue culture is developed based on a principle called‘totipotency’. Totipotency is the inherent capacity of a living plant cell to develop into a complete plant of the same variety. It is a peculiar character of plants. According to this technique, if a living plant cell is isolated from a plant and introduced in the standard culture medium, it grows into a mass of undifferentiated cells called ‘callus’. When the callus is introduced into another culture medium with plant growth hormones such as auxinsand cytotkinins, it grows into a complete plant with root and shoot systems. This plant is genetically same to the plant from which the cell is taken.
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