On the left is a diagram comparing the upper (first two rows) and lower limb bones of a chimpanzee (Pan), "Lucy," a form of A. afarensis, BOU-12/1, the bones which may belong to A. garhi, KNM-WT-15000, an early form of H. erectus, and Homo (modern).
The BOU-12/1 limb bones, if they do belong to A. garhi, indicate a move away from the earlier australopithecine pattern, where the forearms were long compared with the leg bones, and a move toward a more Homo like pattern. Homo erectus, who first appeared in the evolutionary record some 1.7 - 1.8 million years ago, had shortened forearms and longer legs, much like modern humans. The new limbs bones ball right in the middle: the leg bones are longer than the earlier australopithecines, although the forearms are still long.
补充一下 afarensis的意思式阿法种南方古猿 australopithecine是南方古猿 erectus是猿人 garhi是惊奇种南方古猿 把每句话的意思翻译明白就行
用百度翻译器的衮蛋!
200分了。。。。 还是没人能翻译吗?
1.直立人就是猿人的意思 猿人只是教科书上的俗称 2.homo的另一个意思是人类 所以所有的人科动物的名字前面一般都加一个homo 表明他是人科一个物种