Expand the structural features of algae and their meaning.

Features of the structure of algae are as follows:
1. Lack of roots. Instead of roots, algae have translucent thin filamentous processes-rhizoids.
2. The body of the alga has no shoots, leaves or flowers. The body of the algae consists of a thallus or thallus.
3. Algae cells also have a special structure. They can have structures of animal origin, such as flagella (locomotion organelles).
4. Pigments are enclosed in a specialized organ – a chromatophore.
The importance of algae is as follows: absorption of carbon dioxide and release of oxygen, food source, habitat for fish and animals.