The most leaching of minerals occurs from the Horizon A(the top layer) into the horizon B(the sublayer) The zone B which is commonly referred to as the subsoil layer is the zone of accumulation where rain water percolating through the soil from the top layer and it is precipitate within the subsoil(horizon B)
The base which is Uracil or Thymeine
Coevolution happens when the genetic development between two or more species affects the evolution of each other. An example would be hummingbirds and bird-pollinated (ornithophilous) flowers. The ornithophilous flowers give nourishment to the birds with their nectar that has high sugar content. The birds in return aids in the pollination of these flowers.
