In this section, you will learn about the two major groups of prokaryotes, bacteria and archaea. For each group, we will talk about how these living things survive and grow, by discussing their physical structure, methods of getting energy, and methods of reproduction. We will also discuss how these living things interact with other living things, including humans.

This is important because prokaryotes are incredibly common and have a huge impact on our lives. You may already know some of the ways bacteria can be harmful to you, and this is certainly important information. It is also important, however, to understand how prokaryotes help us. Scientists have used knowledge of prokaryotes to create medications and vaccines that have led to a healthier life for billions of people.

Scientific Concepts:

  • The major parts of the bacteria cell and what each of the do
  • The ways bacteria move
  • The ways bacteria reproduce
  • Ways bacteria are helpful and harmful
  • How archae and bacteria are similar and how they are different
  • The places archae live

Select a Lesson

Should I brush my teeth?
One place where bacteria can be found is on your teeth. This is why it’s so important to brush well. Don’t believe me? Then this experiment is for you. You’ll need to gather your materials and make sure you have a toothbrush and microscope nearby. This is important because prokaryotes are incredibly common and have …
Ideas for Exploring Microscopic Life
Living things are all around us.  Sometimes the living things we notice the most are animals, whether its birds chirping in the trees, our pet dogs, or even our fellow human beings.  However, most living things are not animals - they include bacteria, archae, fungi, protists, and plants.  These organisms are extremely important to learn …
Flu Attack!
Ah-chooo! Influenza (the “flu”) is when you get chills, fever, sore throat, muscle pains, headaches, coughing, and feel like all you want to do is lie in bed. The flu is often confused with the common cold, but it’s a totally different (and more severe) virus. The flu is passed from person to person (or …
Magnetic Bacteria
Birds, people, plants, and microscopic organisms need to know where they are as well as where they want to be. Birds migrate each year and know which way is south, and plants detect the sun so they can angle their leaves properly. People consult a map or GPS to figure out where they are. Magnetotactic …
How Bacteria Grow
All living things need a way to get energy. Bacteria get their food and energy in many ways. Some bacteria can make food on their own, while others need other organisms. Some bacteria help other living things as they get energy, others hurt them while they get energy, and still others have no affect on …
Bacteria Micromotor
Bacteria have a bad reputation. Walk down the cleaning aisle of any store and you’ll see rows and rows of products promising to kill them. There are definitely some bacteria that cause problems for people, and we’ll talk about them soon, but we are going to start off positive, and talk about the many ways …
Can Bacteria Get Sick?
When you hear the word “bacteria” what do you think of? If you’re like most people, you probably think of things that can make you sick. Although some bacteria do make us sick, this is not true for all of them. In fact, as we’ll see a little later, some bacteria are very helpful. Did …
Photobacteria
Can your spit glow? Let’s hope not – because if it did, you’d have eaten fish contaminated by photobacteria! Photobacteria are comma-shaped bacteria that have the property bioluminescence.  This means that they give off light, usuafishlly a blue or green.  There are about 15 species of bacteria that fall into this group.  Photobacteria generally live …