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No. It is important to distinguish "species" as a human system of classification, and "speciation" as a biological process. Except in cases like chromosomal speciation (changes in ploidy), speciation takes a long time. Probably thousands of years between some initial restriction of gene-flow, and fixation of a specific identifiable trait, present in all ...


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Yes, but splitting it up into multiple organs is also a disadvantage, becasue you have to grow and upkeep said organs. every solution has its pros and cons that have to balanced. Most of evolution is lesser of two evils compromises, kluges, or "good enough" solutions.


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