Biological species This concept views species as a group of interbreeding natural concept populations that are reproductively isolated from other such groups. It allows populations that are indistinguishable morphologically to be classified as separate, sibling species because they do not interchange genes. Biological species are maintained by reproductive isolating mechanisms Recognition The recognition concept views a species as a group of species concep individuals with a common Specific Mate Recognition System (SMRS). The SMrS consists of all aspects of mating such as compatibility of reproductive organs and gametes, courtship ong and behavior and pheromones. This species definition emphasizes the factors that keep species togetherThis concept views species as a group of interbreeding natural populations that are reproductively isolated from other such groups. It allows populations that are indistinguishable morphologically to be classified as separate, sibling species because they do not interchange genes. Biological species are maintained by reproductive isolating mechanisms. Biological species concept The recognition concept views a species as a group of individuals with a common Specific Mate Recognition System (SMRS). The SMRS consists of all aspects of mating such as compatibility of reproductive organs and gametes, courtship song and behavior and pheromones. This species definition emphasizes the factors that keep species together. Recognition species concept