1 a mutation occurring in a somatic cell, resulting in a change in the morphology or some other aspect of one part of an organism (usually a plant). 2  It may be maintained by vegetative propagation but not by sexual reproduction.oun. 1  a mutation occurring in a somatic cell, resulting in a change in the morphology or some other aspect of one part of an organism (usually a plant). 2  It may be maintained by vegetative propagation but not by sexual reproduction.
Although oxidation reactions are commonly associated with the formation of oxides from oxygen molecules, oxygen is not necessarily included in such reactions, as other chemical species can serve the same function. The reaction can occur relatively slowly, as in the case of rust, or more quickly, as in the case of fire.
To find this answer: Oxygen has an oxidation number of -2. Hydrogen has an oxidation number of +1, and there are 3 of them. you want to get the oxidation numbers to add up to 0, so it would be neutral. -2 + 3(+1) = +1. Now, to get this to equal zero, it means that N has to be -1.