Learn all about genetics and how it works in this interactive teaching aid that highlights the study of genes using colorful animated illustrations.

Lysosomes are found in both plant and animal cells. The structure and functions of this cell organelle are described here, with note made of the diseases that can be caused by defective lysosomes.

Want to learn more about osmosis in the animal cell? This website includes a variety of resources for you to investigate active transport, osmoregulation, and dialysis. Resources includes reference information, diagrams, and lab experiment.

In this lesson plan, students watch video clips of animals and plants in their natural environment, to gather evidence that all living things have basic needs that must be met in order to survive. Then, to illustrate their understanding...

In this unit you will learn about the origin of the cells and their differences. It includes 15 interactive activities.

A frames page that gives the background to understand the way cells communicate (nerve cells). Each topic in the left frame triggers a tutorial on the right. Most have graphics or animated gifs to teach the material. Good background to...

Explore what generates a jet stream, and discover why they flow from west to east. A link is offered in this site to a helpful animation describing the jet stream process.

This informative site provides information on the olfactory receptors, olfactory epithelium, and olfactory bulb. Detailed drawing supplement the text along with an animation that depicts the movement of molecules through the nose.

Every animal starts out as a single, fertilized cell. What happens then? Launch an interactive that showcases four similar-looking embryos. Can you guess what each one of them actually is? Watch them develop.

Try out this great electricity activity by using lemons to make a light bulb glow. You can learn about the science behind the activity and watch an animated demonstration.

Site features high school-level comprehensive info on the structure and function of seed plants organized into shoot and root systems. While presented with lots of detail, clear illustrations and animations help make sense of the parts...

Explore the different ways that animals and plants reproduce.

Use the scientific reasoning and critical thinking to take an in-depth look at the basics of biology.

Reactions in cells must be regulated and one way to do this is using allosteric molecules. These regulators can activate enzymes or inhibit them. This tutorial explains exactly how allosteric regulation works using words, narration, and...

A video animation showing how oxygen is brought to the cells in the body. Follow the oxygen as it is taken in by the lungs as gas and then transformed into solution and carried by hemoglobin throughout the body. Also learn how oxygen...

Explains what vacuoles are and what their functions are in animal cells and plant cells, and offers analogies to help students understand their different roles.

A video showing an animation of how carbon dioxide is exchanged from tissues to the lungs. Understand how an enzyme catalyzes the diffusion and breakdown of carbon dioxide in the red blood cells and lungs to have allowed it to be...

Read this short article to find out about the history of cloning and genetic engineering. Continue on to the next page to find out how cloning is done. Simple terms and fun animations make it easy to read.

A complete site from iKnow.net that compares the various phases of mitosis in plant and animal cells. Text is supplemented with pictures of each phase.

Illustrated explanation of the different steps in protein synthesis. At the end of the article, there are links to some good animations of the process.

Animation showing the mechanics of a DNA array, a recently discovered method to analyze patterns of gene expression at different timepoints in a living cell.

Students are presented with information that will allow them to recognize that yeasts are unicellular organisms that are useful to humans. In fact, their usefulness is derived from the contrast between the way yeast cells and human cells...

The human genome project was established to determine the sequence of DNA bases that are found in each human cell. Understanding what the resulting proteins do is an entirely different project. This page is about how we are trying to...

View a colorful 3-D diagrams of viruses and learn about how their structure helps them infect plants, animals, and bacteria.