* Left: After some weeks in a flower pot green stems with leaves have developed from  a potato while roots were growing into the soil.
* Cover the lower parts of this potato plant with soil in a bigger flower pot.   Keep it wet enough through the summer.
* Middle: 5 new potatoes have grown in the earth, only the cover of the old potato
   was left.
* Right: Fungi can be seen in huge numbers on the stump of a birch cut down a year  before. In the soil each of these plants has thin threads measuring many meters.
  They digest the roots of the birch, while  the hats of the fungi distribute millions of brown cells  for reproduction.