Define mutation: ? what are the sources and types of mutation : ? Also explain the harmful and useful aspects of motion: ?
"Mutation; A gene mutation is a permanent change in the DNA sequence that makes up a new allele in the population. Mutation range in size from change in a single DNA nucleotide to a large segment
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why do we find it useful to have two units for the amount of substance, the kilogram and the mole: ?
it is very useful to have two units for the amount of substance i.e , kilogram and the mole.if we want to consider a specific amounts of mass without considering number of microscopic atoms present in
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