question_answer 4)

Try to trace the various components of human evolution (hint: brain size and function, skeletal structure, dietary preference, etc.). 

Answer:

      During human evolution, ancestral human types had undergone a number of remarkable changes in their brain size (cranial cavity), skeletal features, dietary preference, etc., as shown in the following table:  

Human type	Cranial cavity	Skeletal features	Dietary preference
(i) Australopithecus		Proganthous, well developed supra-orbital ridges and chinless.	Primarily fruit-feeder but also hunted with stones.
(ii) Homo habilis		- do –	Primarily herbivorous.
(iii) Homo erectus		- do –	Primarily a meat-eater.
(iv) H. sapiens neanderthalensis		- do –	Primarily carnivorous.
(v) H. sapiens fossilis		Flat forehead, no supra-orbitla ridges, chin present.	Primarily carnivorous.
(vi) H. sapiens sapiens		- do –	Primarily omnivorous.