1 A donkey is stronger than a horse of the same size. 2  Donkeys have an incredible memory-they can recognise areas and other donkeys they were with up to 25 years ago.3  A donkey will not do something it considers to be unsafe.n many countries of the world, and in many situations, they are used as the preferred mode of transport. Donkeys are much more of an all terrain animal than horses. Donkeys are in fact a highly intelligent animal despite popular misconception.
The term symbiosis, from the Greek words syn (together with) and bios (life), refers to different kinds of organisms living together in ongoing physical association. Although symbiosis is a fundamental biological relationship, it was a disputed concept until the late 1800s, and the term was only first used in 1878.
Symbiosis is a relationship between two or more organisms that live closely together. There are several types or classes of symbiosis: Commensalism One organism benefits and the other is neither harmed nor helped. Mutualism Both organisms benefit. An obligate mutualist cannot survive without its partner; a facultative mutualist can survive on its own. Parasitism One organism (the parasite) benefits and the other (the host) is harmed. To be successful, a symbiotic relationship requires a great deal of balance. Even parasitism, where one partner is harmed, is balanced so that the host lives long enough to allow the parasite to spread and reproduce. These delicate relationships are the product of long years of co-evolution.