Author: Self Study for UPSC

1. Primary fabrication techniques a. Uncontrolled flacking i. Direct percussion ii. Block on block technique b. Controlled flacking i. Step or resolved flacking ii. Cylinder hammer or hollow hammer technique iii. Punching technique iv. Pressure flacking 2. Compound technique a. Clactonian b. Levallois technique c. Fluting – microlithic technique 3. Polishing and grinding – Neolithic […]

Pulse rate also known as  heart rate is a measure of the variation in time between each heartbeat. This variation is controlled by a primitive part of the nervous system called the autonomic nervous system (ANS). It works regardless of our desire and regulates, among other things, our heart rate, blood pressure, breathing, and digestion. […]

Cultural evolution Cultural diffusion Definition : It is a process of social and cultural change in a definite direction from simple to complex, homogeneity to heterogeneity. Definition : It is a process where cultural     elements,    complexes    and aspects     pass     from   one   group   to another. Nature : Cultural Evolution is more complicated in nature as compared […]

Definition : Race crossing is interbreeding between two different human races. Different human races separated geographically have acquired race specific traits which were stylized through natural selection. Interbreeding/ crossing between races would result in admixture of these traits. Examples :  Arabic and Semitic traders have penetrated through Africa. Asiatic traders have passed on and into […]