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The muscles connected to the ears of a human do not develop enough to have the same mobility allowed to monkeys. Arrows show the vestigial structure called Darwin's tubercle. In the context of human evolution, vestigiality involves those traits occurring in humans that have lost all or most of their original function through evolution. Although ...
Vestigiality is the retention, during the process of evolution, of genetically determined structures or attributes that have lost some or all of the ancestral function in a given species. [1] Assessment of the vestigiality must generally rely on comparison with homologous features in related species.
LD 350-1 is now considered the earliest known specimen of the genus Homo, dating to 2.75–2.8 Ma, found in the Ledi-Geraru site in the Afar Region of Ethiopia. It is currently unassigned to a species, and it is unclear if it represents the ancestor to H. habilis and H. rudolfensis, which are estimated to have evolved around 2.4 Ma. [36]
This phenomenon is an automatic-response mechanism that activates even before a human becomes consciously aware that a startling, unexpected or unknown sound has been "heard". [ 2 ] That this vestigial response occurs even before becoming consciously aware of a startling noise would explain why the function of ear-perking had evolved in animals.
The "sense of smell" section doesn't fit with the rest of the sections on human vestigiality. Sense of smell is still being acted on by natural selection. The section makes a point of this and ignores it. If someone can smell toxic fumes, they know to leave the room and are subsequently able reproduce, and thus able to pass on their "nose" gene.
Human body temperature; Human feces; Human skeletal changes due to bipedalism; Human skin color; Human vestigiality; Human waste; Hepoxilin; 5-Hydroxyeicosatetraenoic acid; 12-Hydroxyeicosatetraenoic acid; Hyperchlorhydria
Human evolution is the evolutionary process that led to the emergence of anatomically modern humans, beginning with the evolutionary history of primates—in particular genus Homo—and leading to the emergence of Homo sapiens as a distinct species of the hominid family, the great apes.
Vestigiality, genetically determined structures or attributes that have lost some or all of their ancestral function Topics referred to by the same term This disambiguation page lists articles associated with the title Vestiges .