Symbiosis

Definition

A close and often long-term interaction between two different biological species, which may benefit one or both species.

Etymology

From Greek 'syn', meaning 'together', and 'biosis', meaning 'living'.

Example

The symbiosis between certain ants and aphids is mutually beneficial; ants protect the aphids from predators, while aphids provide honeydew for the ants.

Synonyms

• Mutualism
• Commensalism
• Parasitism

Related Terms

• Mutualism
• Commensalism
• Parasitism
• Coevolution

Usage Notes

Symbiosis can take various forms, including mutualism (both species benefit), commensalism (one species benefits, the other is unaffected), and parasitism (one species benefits at the expense of the other).