Human evolution is a complex process that traces the development of modern humans from our early ancestors. To arrange the stages of human evolution from past to recent, consider the following order:
The correct sequence, therefore, is: A-D-C-B.
| Pair of skeletal parts | Category | |
|---|---|---|
| (a)$\,\,$ | Sternum and ribs$\,\,$ | Axial skeleton |
| (b)$\,\,$ | Clavicle and glenoid cavity$\,\,$ | Pelvic girdle |
| (c)$\,\,$ | Flumerus and ulna$\,\,$ | Appendicular skeleton |
| (d)$\,\,$ | Malleus and stapes$\,\,$ | Ear ossicles |
| Convergent evolution | Divergent evolution | |
|---|---|---|
| (a) | Eyes of octopus and mammals | Bones of forelimbs of vertebrates |
| (b) | Thorns of Bougainvillea and tendrils of Cucurbita | Wings of butterfly and birds |
| (c) | Bones of forelimbs of vertebrates | Wings of butterfly and birds |
| (d) | Thorns of Bougainvillea and tendrils of Cucurbita | Eyes of octopus and mammals |