The total number of individual present per unit area is called as :
Species density.
Population density.
Population genetics.
Population ecology.
Mycorrhizae is an example for :
Commensalism.
Parasitism.
Obligate mutualism.
Facultative mutualism.
A local population adapted genetically to its particular environment is called :
Neotype.
Biotype.
Ecotype.
Peotype.
