Protists
Protists are diverse mostly single-celled eukaryotes.
About this topic
Protists are a diverse group of mostly single-celled eukaryotes that don't fit into other kingdoms. Animal-like protozoa include Amoeba and Paramecium, plant-like algae photosynthesise, and fungus-like slime moulds. They live in water and damp environments.
Algae produce much of the world's oxygen and form the base of aquatic food chains as phytoplankton. Protozoa move using pseudopods, cilia or flagella and feed by engulfing food. Euglena is interesting because it has chloroplasts and can photosynthesise in light but feed on organic matter in the dark, showing how blurred the groups are.
Some protists cause disease. Plasmodium causes malaria, spread by Anopheles mosquitoes, and kills hundreds of thousands each year. Amoebic dysentery comes from contaminated water. Controlling mosquitoes with nets, drainage and insecticides, and treating patients with drugs, are key measures.
Protists are called a kingdom of leftovers because they share a eukaryotic cell structure but little else. A common misconception is that they are simple; a single Paramecium carries out all life processes, including feeding, excretion and reproduction, inside one cell.
Key ideas
- Amoeba, paramecium, algae
- Some photosynthesise
- Malaria is caused by a protist
Quick check
Use cases: where Protists helps
- Homework: review the key idea behind Protists before you start a problem set.
- Exam revision: use the quick check to test whether you can recall Protists without notes.
- Visual learning: play with the interactive lab to see how Protists changes when you adjust its inputs.
- Teaching a friend: explain Protists in your own words, then compare your version with the key ideas.
Biology underpins medicine, farming, conservation and biotechnology.
Frequently asked questions
What is Protists?
Protists are diverse mostly single-celled eukaryotes.
What will I learn in Protists?
Amoeba, paramecium, algae. Some photosynthesise. Malaria is caused by a protist.
Is Protists part of Biology?
Yes. It is one of 150 Biology topics on LearnViz HighSchoolEdu, with 3 key ideas, a live animation and a quick check.
Does the Protists lab work on a phone or tablet?
Yes. The animation resizes to fit your screen and supports touch, so you can drag, tap and slide with your finger.
How should I study Protists?
Read the summary and key ideas first, play with the interactive lab to see the idea in motion, then answer the quick check. If you get a question wrong, go back to the key idea it tests.
Do I need an account, and is my progress saved?
No account is needed. Marking a topic as learned is saved in your own browser, so it stays on that device and is not sent to a server.