Fungi
Fungi decompose matter and form mushrooms and yeast.
About this topic
Fungi are eukaryotes with cell walls of chitin that feed by absorbing nutrients from dead or living matter (saprotrophs or parasites). Most are multicellular with thread-like hyphae forming a mycelium; yeasts are single-celled. Mushrooms are fruiting bodies producing spores.
Fungi are key decomposers, secreting enzymes onto dead matter and absorbing the digested products, which returns nutrients to soil. Some form mutualistic mycorrhizae with plant roots, extending the root system so the plant gets water and minerals while the fungus gets sugars. Others are parasites causing athlete's foot, ringworm and crop diseases like wheat rust.
Humans use fungi in many ways. Yeast makes bread rise and ferments beer and wine, moulds ripen blue cheese, and Penicillium gave us the first antibiotic, discovered by Alexander Fleming in 1928 when mould killed bacteria on a dish. Mycoprotein from fungi is eaten as a meat substitute.
Fungi are not plants: they have no chlorophyll and cannot photosynthesise, and their walls contain chitin, not cellulose. Students often think a mushroom is the whole organism, but the main body is the hidden mycelium underground, which can be enormous.
Key ideas
- Cell walls of chitin
- Hyphae and mycelium
- Yeast ferments sugars
Quick check
Use cases: where Fungi helps
- Homework: review the key idea behind Fungi before you start a problem set.
- Exam revision: use the quick check to test whether you can recall Fungi without notes.
- Visual learning: play with the interactive lab to see how Fungi changes when you adjust its inputs.
- Teaching a friend: explain Fungi in your own words, then compare your version with the key ideas.
Biology underpins medicine, farming, conservation and biotechnology.
Frequently asked questions
What is Fungi?
Fungi decompose matter and form mushrooms and yeast.
What will I learn in Fungi?
Cell walls of chitin. Hyphae and mycelium. Yeast ferments sugars.
Is Fungi 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 Fungi 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 Fungi?
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.