The aim of this article is to relate the history of oxygen in the atmosphere to the evolution of photosynthesis, aerobic respiration, mitochondria, and life on earth.

Describes the structure and functions of the mitochondria.

DNA of the mitochondria has most commonly been used to construct evolutionary trees. New field of population genetics hopes to resolve important questions in migration theories that involve Aboriginies in Australia, North America, and...

Imagine having a microscopic camera so small that you could travel inside a cell. This interactive site allows you to do just that. Click on any one of eight individual parts of the cell--cell membrane, nucleus, DNA, RNA, ribosome,...

[Free Registration/Login may be required to access all resource tools.] Take a close look at the endosymbiotic theory scientists have developed to explain the evolution of eukaryotes. Understand that chloroplast and mitochondria used to...

Very good science e-book that details why cells are the fundamental unit of life and why our health depends on what happens within the many different cells that make up our body. Each chapter is presented separately and the book can also...

36-page tutorial takes a look at the organization of living cells.

Description of organelles. Links will take you to a glossary with pictures for many of the definitions. Ends with a quiz linked to answers.

Discover how mitochondrial DNA (mtDNA) is inherited, and complete a pedigree chart by determining which individuals might share mtDNA with an unknown ancestor.

The Tree of Life is a multi-authored, Internet distributed project containing information about phylogeny and biodiversity. The Tree of Life can be used to locate information about a particular group of organisms through their taxonomy.

This cellular biology page presents extensive detail on the chemical nature of the cell membrane. Using the Chime plug-in, students can manipulate and study models of the membrane.

This site provides detailed information on chloroplasts. Explains the many duties that chloroplasts perform and why they are so important. Good diagrams.

[Free Registration/Login may be required to access all resource tools.] Learn about the evolution of eukaryotes which is explained by the endosymbiotic theory.

The organelles and cytosol, taken together, comprise a cell's cytoplasm. This interactive site provides information regarding cytoplasm and cellular organelles.

Informative text is clearly written and supported by good illustrations and charts as well. A quiz is also provided at the bottom of the site.

This is a thorough site which contains a glossary of plant/animal cell anatomy terms. Diagrams of both cells are included along with worksheets to label.

In this third unit of a Biology course, students learn about cells and cell structure. They compare prokaryotic and eukaryotic cells and learn about the specialized structures in a cell and what their functions are. They will also learn...

An in-depth discussion of the different parts of eukaryotic and prokaryotic cells as well as a thorough explanation of organelles within the cell. The text is better suited to high school and middle school. However, there is a picture of...

[Free Registration/Login may be required to access all resource tools.] An overview of cellular respiration and mitochondria.

Graphics and movies showing three-dimensional reconstruction of mitochondriom.

This resource provides a detailed diagram of animal, bacterial and plant cells and viral structure. Also included are detailed drawings, with definitions, of each of the cellular organelles.

Find out about the essential role energy plays in cell function and in sustaining life. Trace energy transformations as they pass from one living thing to another.

Do you understand the fundamental concepts of metabolism? You can find out by going through the quizzes and accompanying tutorials of this resource.

This tutorial compares prokaryotic and eukaryotic cellular organization and contrasts cells with viruses. Includes a practice quiz to test your knowledge.