A close biological relationship between two species is known as ...

A close biological relationship between two species is known as ...

• A. Symbiosis
• B. Emigration
• C. Population density
• D. Immigration

Answer: (A)

Symbiosis is a close, long-term interaction between two different species. This relationship can take several forms, such as mutualism where both partners benefit (for example, pollinators and flowering plants), commensalism where one benefits and the other is unaffected, and parasitism where one benefits at the expense of the other. The other options describe movement or population measurements rather than relationships between species: emigration is leaving an area, immigration is entering, and population density is how many individuals live in a given space. So the term that fits a close biological relationship between two species is symbiosis.

Symbiosis is a close, long-term interaction between two different species. This relationship can take several forms, such as mutualism where both partners benefit (for example, pollinators and flowering plants), commensalism where one benefits and the other is unaffected, and parasitism where one benefits at the expense of the other. The other options describe movement or population measurements rather than relationships between species: emigration is leaving an area, immigration is entering, and population density is how many individuals live in a given space. So the term that fits a close biological relationship between two species is symbiosis.