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finite aggregate of organisms, meeting genetic and/or taxonomic definition of the species and similarly related to resources and conditions of environment (of similar spe

usually under B.s. or simply species it is understood a population, or variety of populations, of species which are able to crossbreed forming a fecund produce (without r

a number of various types of biological plants or phenomena and frequency of their meeting on a fixed portion of space and time generally reflecting a complicated form of