Primary succession is a method of fertilizing soil that was barren and had never supported plant life, for example soil left over by a moved glacier of lava. The soil is first "normalized", using pioneer species such as lichens, algae and fungi. After this, plants able to survive in less harsh conditions such as grasses. Therefore, the fertility of soil during early years of primary succession does not increase much and it is a process that involves a long period of time.
the main difference between animal cell and plant cell is in existing of cell wall on plant cell and existing of centriols in animal cell large vacules in plant cell ...
