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Q. What are the main causes of Mutation?
Some mutations take place randomly and spontaneously during process of mitosis or meiosis. Others are caused by mutagenic agents that are environmental or man-made factors that can increase frequency of mutation. Environmental factors like ultraviolet rays of the sun can cause changes in DNA which can result in skin cancer. Cosmic rays from space that penetrate earth's ozone layer are also a cause of mutation. Ionizing radiation like X-rays, gamma rays and nuclear radiation produce free radicals (atoms with unpaired electrons) in the cell which can cause breaks in DNA molecule. Carcinogens are chemical mutagens which cause gene mutations which can lead to cancer. A few instances of carcinogens are asbestos, benzene, some food dyes and PCBs.
Sound is a main mean of communication and entertainment and is also very effective alarm system for some animal. A loud and unwanted or unpleasant sound causes discomfort and is ca
Explain E. coli - Microbiological Study of Water? It is always present in human intestine so its presence indicates the faecal pollution and possible presence of other human or
Q. What is cross contamination? Cross contamination is the passage of micro-organisms from one person to another via any route direct or indirect.
Q. Drug Management for gout disease? Drugs are so effective in lowering the serum mate concentration that rigid restriction of dietary purines is rarely necessary. Uricosurie d
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Advantage of solar energy: 1. It is renewable: it produce comes from sun, so it is plentiful and will always be there as long we need it . 2. Solar
Functions of cerebrum The forebrain is otherwise called as ‘cerebrum'. It is highest centre for controlling several functions in the body, The most interesting aspect
Injection Route An injection is an unpleasant experience for a person at any age and is particularly traumatic to the small child who often lives in fear to the next "need
Q. What are the four groups of protozoans? The four main groups of protozoans are the mastigophores flagellated, like the trypanosome that causes Chagas' disease, the sarcodine
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