Question

Every evolutionary step had to build successively on every preceding one so that, ______________, fully evolved modern humans could emerge in africa about 100,000 years ago.

Answer 1

The evolutionary pattern of the modern humans mainly the development of intellect. The early evolution of the bipedal locomotion in humans allowed them to use their brain for various purposes.

Also, the changes in the eating habit as well as locomotion pattern reinforced the anatomical changes, So, the evolutionary trends of the humans mainly emphasize on the change in intellect or cranial capacity and anatomy.

All the event shows a steady increase in the cranial capacity from apes to modern humans. exception being the neanderthals, who exhibited a slightly higher cranial capacity than modern humans.

So, the correct answer is intellectually and anatomically.