There are so much genes in chromosomes in any cell of the construction of excellent plants. However, less of them are active practically and others are inactive. The question poses is that why any cell have excess genes? And what is the function of these inactive genes. We observed that they gather their genes within a cell, by grouping polycellular creatures, they remove the problem of losing each other. Consequently, any new cell resulting from this cell includes all genes belonging to the creatures. That is, if first four creatures are coexistent in a group, each cell of the group will include the genes of any first four creature. Within each cell (of body excellent plant) only genes related to one of these creatures will be active but other will be stored inactively. These additional genes will be used with asexual multiplication. For example, it is because of these additional genes that a tissue derives from other tissues in tissue cultivation. In fact, these excess genes carry the construction plan of other tissues, i.e. they carry construction plan of other coexistent creatures.
There are different tissue in the body of excellent. In the cells of each of these tissues, one part of genes are active. In parenchyma, some of gene are active, in vessel tissues, other parts of genes and in the root some others. In common sense, other genes in a cell remain inactive. But, when we cut a stem of this plant and propagate by slips, we observe that the root is generated on the stem. At this time, the inactive genes of stem cells acts and show drawing of root building. That is, in each cell of a plant, there is the building drawing of leaf, stem and root. That is, there is one sample (agent) of the three single creatures in a cell. Whenever one of them is lost, the gene samples (agent) acts and generates their coexistent creature. When we cut a stem and propagate it, the stem (parasitic fungus) loses root coexistent (soil-living fungus) and has to find a new coexistent creature. But instead of following it or waiting contact with, uses genes stored before to build its coexistent and builds a root for itself. In lichens, still such a gene exchange has not been occurred. When one of the creatures loses its coexistent, it is not able to build it once more and it should wait and find a new coexistent create. That is they remain one stage behind of the excellent plants. Therefor, we can say excellent plants are advanced lichens.