Dragmire800 t1_is0l45w wrote
Reply to comment by XenaWolf in TIL that all Shiba Inu alive today are descended from one single Shiba, "Ishi," born in 1930. by Tsujimoto74
No, it’s a single individual. One individual lifeform came to be in the primordial oceans of earth, which multiplied and branched out. A whole species didn’t pop out of volcanic vents and start breeding, it was one little guy
Maybe other individuals were also created, but they weren’t the same species, they didn’t evolve, they were formed. They don’t factor into our evolution, only one individual ended up as us
XenaWolf t1_is0ly0d wrote
In biology and genetic genealogy, the most recent common ancestor (MRCA), also known as the last common ancestor (LCA) or concestor, of a set of organisms is the most recent individual from which all the organisms of the set are descended.
The possibility is mentioned, above, that all living organisms may be descended from an original single-celled organism with a DNA genome, and that this implies a single origin for life. Although such a universal common ancestor may have existed, such a complex entity is unlikely to have arisen spontaneously from non-life and thus a cell with a DNA genome cannot reasonably be regarded as the “origin” of life.
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Edit: I didn't read close enough, you're right, it is individual.
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