Online College Courses for Credit

Early life

Early life

Author: Susan Gooden

This lesson provides an overview of the formation of early life and mass extinctions.

See More
Fast, Free College Credit

Developing Effective Teams

Let's Ride
*No strings attached. This college course is 100% free and is worth 1 semester credit.

28 Sophia partners guarantee credit transfer.

286 Institutions have accepted or given pre-approval for credit transfer.

* The American Council on Education's College Credit Recommendation Service (ACE Credit®) has evaluated and recommended college credit for 26 of Sophia’s online courses. Many different colleges and universities consider ACE CREDIT recommendations in determining the applicability to their course and degree programs.


Early Life

Source: Image of microbial mat, PD,

Notes on "Early Life"


(00:00 - 00:19) Introduction

(00:20 - 01:09) Early Life Forms

(01:10 - 01:44) Formation of First Life Forms

(01:45 - 03:19) Prokaryotes and Eukaryotes

(03:20 - 03:46) What is Evolution?

(03:47 - 04:34) From water to Land

(04:35 - 04:55) Conclusion