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.
Using the oxidation numbers of the the atoms that constitute the sulfate ion that has a formula of SO4, the oxidation state is determined by adding the oxidation number of sulfur and oxygen.Sulfur has an oxidation number of 6, or it loses 6 atoms when it forms a chemical compound.Oxygen atoms on the other hand accept 2 electrons each when they form a compound. The sulfate anion has a formula of SO4, this gives a net oxidation state of +6 + 4*(-2) = -2.osted on. (Answer #1). The oxidation number refers to the charge on the central atom of a compound when the ligands attached to it are removed and so are the atoms that associated with the ligand. For the sulfate anion it is the oxidation state that can be determined not the oxidation number.