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Examples of Clovis and other Paleoindian point forms, markers of archaeological cultures in North America. The Solutrean hypothesis on the peopling of the Americas is the claim that the earliest human migration to the Americas began from Europe during the Solutrean Period, with Europeans traveling along pack ice in the Atlantic Ocean.
Human taxonomy is the classification of the human species within zoological taxonomy. The systematic genus , Homo , is designed to include both anatomically modern humans and extinct varieties of archaic humans .
For instance, modern humans are Homo sapiens sapiens, or H. sapiens sapiens. In zoological nomenclature, higher taxon names are normally not italicized, but the Botanical Code , the Prokaryotic Code , the Code for Viruses , the draft BioCode [ 4 ] and the PhyloCode [ 2 ] all recommend italicizing all taxon names (of all ranks).
The most urbanized regions are Northern America (82%), Latin America (81%), Europe (74%) and Oceania (68%), with Africa and Asia having nearly 90% of the world's 3.4 billion rural population. [148] Problems for humans living in cities include various forms of pollution and crime , [ 149 ] especially in inner city and suburban slums .
The orangutans were reassigned to the family Hominidae , which already included humans; and the gorillas were grouped as a separate tribe (Gorillini) of the subfamily Homininae. [3] Still, details of this reassignment remain contested, and of publishing since (on tribe Hominini), not every source excludes gorillas and not every source includes ...
The ocean represents the largest continuous planetary ecosystem, hosting an enormous variety of organisms, which include microscopic biota such as unicellular eukaryotes (protists). Despite their small size, protists play key roles in marine biogeochemical cycles and harbour tremendous evolutionary diversity.
The phylum Cercozoa includes many of the most abundant and ecologically significant protozoa in soil, marine and freshwater ecosystems. [ 8 ] Soil-dwelling cercozoans are one of the dominant groups of free-living eukaryotic microorganisms found in temperate soils, accounting for around 30% of identifiable protozoan DNA in arid or semi-arid ...
"Asgard" or "Asgardarchaeota" [2] is a proposed superphylum belonging to the domain Archaea that contain eukaryotic signature proteins. [3] It appears that the eukaryotes, the domain that contains the animals, plants, and fungi, emerged within the "Asgard", [4] in a branch containing the Heimdallarchaeota. [5]