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The selection of the organism that survives best in a habitat with limited resources and that organisms superior reproductive success is called natural selection.
Zonation
Living factors in the environment is called biotic factors.
The surroundings where organisms live is called a habitat.
Organisms live everywhere
niche
biotic factors
habitat
The conditions under which an organism survives and exists in the community is called its ecological niche. This includes the resources it needs, how it interacts with other species, and its habitat requirements. Each species occupies a unique niche to avoid competition with others.
It's called a niche.
They are called "Biomes"
There is no particular relationship between organisms that have identical alleles for a particular trait.