Lessons

diatom cover

Diatoms

Diatoms are free-floating unicellular algae in oceans and freshwater. Their cell walls are made of silica, giving them colorful and opal-like appearances.

green algae cover

Green Algae

Green algae are a diverse group of photosynthetic eukaryotic organisms. It includes unicellular and multicellular algae, such as seaweeds.

euglena organelle

Euglena

Euglena is a single-celled eukaryote with flagella and it shares some characteristics of both plants (chloroplasts) and animals (flagella and eating).