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Through the process of descent with modification, the common ancestor of life on Earth gave rise to the fantastic diversity that we see documented in the fossil record and around us today. Evolution means that we're all distant cousins: humans and oak trees, hummingbirds and whales.

Photo courtesy Shutterstock. There are four basic mechanisms by which biological evolution takes place. These include mutation, migration, genetic drift, and natural selection. Each of these four mechanisms are capable of altering the frequencies of genes in a population and as a result, they all are capable of driving descent with modification.

EARLY THEORIES OF EVOLUTION: 17th-19th Century Discoveries that Led to the Acceptance of Biological Evolution

BIO 301 Human Physiology Cell Structure & Function | Cell membranes Cells, cytoplasm, & organelles | DNA & protein synthesis | Cell environment | Movement across membranes | Cellular metabolism Evolution Human evolution Human prehistory Physiology - science that describes how organisms FUNCTION and survive in continually changing environments Levels of Organization: (Source: Hunter and Borg 2003).

The purpose for this site was for a game on evolution. The site was designed for students, of all ages, and teachers, which he provides tips for. There are multiple games which one can use for other parts of biology. Over all I think this site is well done, and can easily be used. Content is simple but proves a point.

The purpose of this site is to teach about genetic trees. Is an upper level reading level so older students. Everything that is in the site is labeled and summarized at the beginning. Overall the website is very well put together and easy to use.

Ryan Mikesell ITEC Web Review 1/23/10 Overview: Weldinghistory.org is an informational website about the history of welding technologies. The website's main objective is to provide information about the evolution of welding technology from 6000 B.C. to present time, from brazing to current welding processes. The author's name is Mark Sapp professional welder and author of many welding technology books. The website is designed for anyone seeking educational information about the origins of welding and can be useful for teachers of Agriculture Education, teaching welding tech. The content is very informational and easily accessed. Content: Although the page is managed and created by a single author he provides all his references and links to the sites he used information from. The content is organized in a way that it can be easily understood and navigated allowing the user to use the site for educational purposes. Upon arrival at the site you have the option of researching two of the main metal bonding processes, brazing and welding, making it twice as informational. The site provides video references and images as well as quizzes created by the author that can be used in a classroom. In addition to all the information the author provides he also includes and e-mail and a message board that increase the value and credibility of the website. All revision dates and information about the author is included. Overall the website content is highly professional and valuable to an educator or student looking for welding technology history and information. Design: The design of the website is very simple and easy to navigate. There are bold subject headings directing the viewer to the necessary pages with ease. No major ads distract from the information and images and videos are available to increase educational value. The author clearly represents the references for the information and provides the revision dates for each page.

Bryana Wilson September 20, 2009 Website Review http://www.sonnets.org/early.htm "Sonnet Central" is a site dedicated to all different types of sonnets in many different time periods. The author of this site, Eric Blomquist, has done an excellent job of putting the site together in an interesting and organized way. The site serves as an archive of sonnets and does a good job in defining the histories and form of them as well. It is evident that he is passionate about this style of poetry, and in essence, catches the evolution of it quite nicely. CONTENT The content of this website is evident in the title. "Sonnet Central" is full of many different types of sonnets. It covers all different kinds of sonnets from differences in location, time, and style. It includes sonnets from all over the world and has sonnets set apart in different periods- from the 12th century to the early 20th century- most of which are English- but includes quite a few Petrarchan as well. There are also links to sections that you can use to search, view an alphabetical list of authors, listen to sonnets being read, and even read criticisms. It also includes a forum for modern poets to post their own poetry and discuss the information presented on the page. It is clear that Mr. Blomquist's site is aimed toward poets and those wanting to get acquainted with the sonnet- and the material on his site is easy to interpret and understand. There is an email link for contacting Mr. Blomquist if there are any questions or comments regarding his site and it is located on the site's homepage in the opening paragraph. It was last modified in 2007, but given the subject- the sonnet- I would trust the material is far from outdated. It loads quickly and works on several different browsers. DESIGN "Sonnet Central" is put together in an interesting way. The information is fairly easy to find and is set up in a rather organized manner, including a table of contents on the main page.

This website allows adults to explore and learn about art and its history from the basics of viewing art to understanding the evolution, from Ancient Cultures to today. This site provides Art history in a basic "easy-to-use" format combined with helpful videos and images. The layout of the site isn't distracting and makes seeking out narrow information an effortless task. Khan Academy strives to share knowledge to eager minds and with just a couple of clicks through the pages the audience is curious and engaged.