Here are all the episodes he kisses her ! Coming Together-Kisses her before he leaves leaving only a Note. Summer's End-kisses her in the Rain while dating Kit and Amy wants him back but he rejects her..
Symbiosis occurs when two different species benefit from living and working together. When one organism actually lives inside the other it's called endosymbiosis. The endosymbiotic theory describes how a large host cell and ingested bacteria could easily become dependent on one another for survival, resulting in a permanent relationship. Over millions of years of evolution, mitochondria and chloroplasts have become more specialized and today they cannot live outside the cell.
1 The relationship between two different species of organisms that are interdependent; each gains benefits from the other. 2  A relationship between different species where both of the organisms in question benefit from the presence of the other.ymbiosis. 1  Anton de Bary's original definition says: a long-term relationship between two different species. 2  To this can be added, mutualism, (benefit for both), commensalism (benefit for one neutral for the other) and parasitism (benefit for one, costly for the other).