Question

Biological Anthropology question:

What are the three major changes in human evolution? Be specific

Answer 1

Three major changes in human evolution are

1. Bipedalism
2. Cranial cavity expansion ( brain expansion)
3. Culture and social development

Bipedalism was was the first morphological trade on the long road to humanity. In most of the primates there is facultative bipedalism that means it's temporary and is only used in certain conditions, bipedalism is also seen birds and kangaroos but the bipedalism in human was first seen in earliest ominous and it gave the advantage of carry weapons in hands which were used to hunt animals

Cranial cranial cavity expansion - it includes increase in the brain size and increase in the size of the brain in relation to the total body mass.

There are certain disadvantages related to the increase cranial cavity -

• Increased brain size would take around 30% of humans metabolic energy
• Results in longer period of infant dependency
• Due to longer infant dependency mother require more nutrition for what the infant and herself

Homosapiens have a cranial cavity size of 1500 cc

Culture and social development - ​​​​​​​during during early evolution humans learn that the hunting task which most difficult to one person was easily achieved in groups, hunting in groups and living in groups led to the development of social and cultural aspects of human life .