W
wildleafblower
Guest
Gottle of Geer;4640816##** Even so said:**Howard Hughes Hughes Medical Institute: **
Question:
James, Boston, MA, USA
In the human body what is the most compelling evidence that we are ancestors of apes or other lower primates?
**
Answer**
Kristie Mather
HHMI predoctoral fellow,
University of California at Berkeley
First, I’d like to clarify a common misconception regarding human evolution. Humans are not the ancestors of living nonhuman primates, nor are any living nonhuman primates the ancestors of humans. Instead, humans and nonhuman primates share a common ancestor. That is, humans, apes, and other primates are branches on a primate tree that evolved from a common ancestor that existed at the convergence of the branches.
That said, the most compelling evidence that all primates (including humans) share a common ancestor comes from a variety of sources: molecular studies, comparative morphology (the study of the physical similarities and differences between different taxa), and paleoanthropology.
Molecular studies (which are essentially comparative studies at the genetic level) have demonstrated the great similarity between human DNA and that of other primates. For example, 98.5% of the DNA sequence of humans and chimpanzees is identical.
When comparative morphologists study the physical characteristics of mammals, they find that primates (including humans) share a unique suite of characteristics. Some of these include grasping hands (opposable thumbs), locomotion that’s dominated by the hind limbs, increased reliance on vision (the eyes are shifted to the front of the head for stereoscopic vision), decreased reliance on smell (the snout is smaller), larger brains, longer life spans, and lower reproductive output. All of these are evidence that all primates share a common ancestor.
Finally, when paleoanthropologists study the fossils of our ancestors, they find that they resemble the fossils of the ancestors of other primates and that the similarity increases as you go further back in time I recommend Introduction to Physical Anthropology , by Robert Jurmain and Harry Nelson (1994, West Publishing Company), especially the chapters on primates (“Living Primates,” “Fundamentals of Primate Behavior,” and “Primate Models for Human Evolution and Primate Evolution”).
hhmi.org/askascientist/answers/in_the_human_body_what_is_the_most_compelling_evid ence_that_we_are_ancestors_of_apes_or_other_lower. Html
http://www.hhmi.org/askascientist/answers/in_the_human_body_what_is_the_most_compelling_evid ence_that_we_are_ancestors_of_apes_or_other_lower. Html
I’m not an ape nor were my mom or dad.![]()