Summary
Photosynthetic protists and plant-like organisms that produce a large share of the world's oxygen.
In depth
Algae include green, red and brown algae and diatoms; they range from microscopic to giant kelp 50 m long. Diatoms have silica shells. Phytoplankton fix as much carbon as all land plants combined.
Algae are used as food, fertiliser and biofuel feedstock.
Algal groups differ in pigments and storage products. Diatoms, dinoflagellates and green algae are common. Some produce toxins.
Example: algal oil supplements provide omega-3 fatty acids.
Frequently asked questions
What is Algae?
Photosynthetic protists and plant-like organisms that produce a large share of the world's oxygen.
Which area of biology covers Algae, and how advanced is it?
Algae is one of the 54 topics in Microbiology. It is rated Beginner, so it suits learners who are starting out in biology. Related topics in this area include Microorganisms, Protists, Fermentation.
Can you give an example of Algae?
Agar and carrageenan are extracted from red algae.
What should I learn before Algae?
Algae is a Beginner topic, so no earlier topic is required. Other Beginner topics in Microbiology that pair well with it include Microorganisms, Bacteria, Archaea.
What topics are related to Algae?
The closest topics to Algae are Microorganisms, Protists, Fermentation, Culture Media. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Algae?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Algae. To practise the whole of Microbiology, use the Microbiology quiz.
How is Algae different from Microorganisms?
Algae: Photosynthetic protists and plant-like organisms that produce a large share of the world's oxygen. Microorganisms: Living things too small to see without a microscope, including bacteria, archaea, protists, fungi and microscopic algae. Read both side by side and note what each one explains.
How should I study Algae step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Microorganisms and explain the difference aloud. Finally, take the Microbiology quiz and come back to this page for any question you miss.