06/08/2021
Today My lecture on Geological time scale in easiest way...... class bio xi
This time scale indicate the age of different organisms on the earth.... This time scale consist of the 5basic units.
1.Eon(The largest basic unit of the G. T. S)
2.Era
3.Periods
4.Epoc
5.Age(The smallest basic unit of G. T. S)