Question

Anatomical changes in hominins that are indicative of habitual bipedal locomotion include

Select one:

a. feet with opposable big toes for grasping

b. all of the answers are correct

c. increased length of arms relative to legs

d. shortening and broadening of the pelvis

Answer 1

A).. Correct answer

Now we come to the explaination that what changes were happened that time::---

*Bipedalism is the basic adaptation of the all hominid(involves hominins also) that brought changes in skeleton of all these.

*It is possible that it was favoured it freed the hands to raching and carrying food saved energy during locomotion enabled long running and hunting.

*Anatomically, Bipedalism is result of extensive changes in skeleton of hominins not just to the legs and pelvis but feet and vertebrae coloumn, ankle and skull as well.In the feet the big toe moved into alignment with the other toe to support forwarding locomotion.

Pelvis were becoming broad to maintain upright above portion in hominins as well as arms and forearms shortened relative to the legs made them faster in locomotion.

That's it.