Interbreeding between archaic and modern humans
Modern humans have genes of at least 5 other Hominids.
Neanderthals
Denisovan
Unknown West African Hominid
At Least 2 Unidentified Eurasian Hominids
Two species really can’t exist in the same exact niche in the same place. If humans and other humans target the exact same prey, they will fight a lot. If humans can do everything other humans can do, they will either stop doing some of it to give other humans a niche, or replace them. it’s possible sapiens could do everything neanderthals could, and some of them joined us, making us better at their specialties, and some of them stayed separate and were overrun. not niche collapse, but niche scarcity.
It count’s as a different species when the children of two individuals are no longer fertile, or the individuals are unable to mate with individuals in the other group.
This gets more iffy with budding organisms so I’d just say if there is enough of a genetic difference, such as having more or less chromosomes than the other species.
I just want to say that I did not expect an entirely new thread to come out from an article I posted. Great stuff from everyone here!
Also, I would like to add that this isn’t even including other infraspecific taxonomic ranks, such as ecotypes or strains. And anyone who is familiar with Zoology or Botany knows just how confusing it can be with their respective taxonomic nomenclature.
Example from Wikipedia on Zoological Taxonomy Ranks:
Example from Wikipedia on Botanical Taxonomy Ranks:
Should we keep this distinction between plant-like organism classification and non-plant-like organism classification?
- Yes
- No