Nitrogen fixation.
Nitrogen fixing prokaryotes within the soil assimilate N2 to NH3.
Percolating water can both remove mineral materials as well deposit it. Percolating water removes the undesirable materials from the rocks that come in its contact. In this way it erodes the surface of the rock and deposits it on the upper layer of the soil, thus enriching the soil.
Similarly the desirable materials are removed from the surface and deposited and concentrated. These processes are referred as secondary enrichment.
1. Prokaryote - A microscopic single-celled organism that has neither a distinct nucleus with a membrane nor other specialized organelles.
Eukaryote - An organism consisting of a cell or cells in which the genetic material is DNA in the form of chromosomes contained within a distinct nucleus.
2. Two cell structures found in both are a cell membrane and plasma membrane. (you can also use cytoplasm)
3. Two organelles in Eukaryotic cells are mitochondria, chloroplasts, endoplasmic reticulum, lysosomes. (List whichever two)
Reword somewhat so you don't get into trouble when using your answer.
