Evolutionary Biology & Ecology BIO102

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Photo depicts Earth from space.
This NASA image is a composite of several satellite-based views of Earth. To make the whole-Earth image, NASA scientists combine observations of different parts of the planet. (credit: NASA/GSFC/NOAA/USGS)

Viewed from space, Earth offers no clues about the diversity of life forms that reside there. The first forms of life on Earth are thought to have been microorganisms that existed for billions of years in the ocean before plants and animals appeared. The mammals, birds, and flowers so familiar to us are all relatively recent, originating 130 to 200 million years ago. Humans have inhabited this planet for only the last 2.5 million years, and only in the last 200,000 years have humans started looking like we do today.

In BIO101, you were introduced to biology on a microscopic scale when you learned about the functions of molecules, genes, and cells. In this course, you will learn about biological changes that happen on a very large scale, across entire populations of organisms and over the course of millions of years, in the form of evolution and ecology. Evolution, the process by which different species of organisms have developed and diversified from their evolutionary forbears, has been a central theme in the field of biology ever since Darwin first published his theories about it. Mounting evidence from many different branches of science all point to the fact that species have experienced a gradual but definite physical change. In this course, we will learn about evolution and theories that stem from evolution.

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Evolutionary Biology & Ecology BIO102
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120 Pages
2014
English US
Educational Materials



Source:  Olivia D'Ambrogio Introduction to Evolutionary Biology and Ecology. (The Saylor Academy 2014), http://www.saylor.org/courses/bio102/ (Accessed 16 May, 2014). License: Creative Commons BY-NC-ND
Carly Allen
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