Algae, which belong to the group of

Algae, which belong to the group of thallus plants, include
eukaryotes (for instance Spirogyra sp.), as well as organisms with
prokaryotic cell structure – Cyanoprokaryota, also known as blue-green
algae.We are currently familiar with over 20000 species of algae. They
are encountered in every place where water is present at least
periodically. Their habitat ranges from subpolar areas to hot springs.
Algae can live on soil, rock and tree bark, and even can penetrate the
tissue and body of other organisms. They display varied morphological
structure of the thallus (single-celled and multi-celled species, species
forming colonies, species with thread-like thallus). They also vary in
shape and size, from species as small as 1 μm to large, leaf-like species
that fix to surfaces using rhizoids. In the trophic chain, algae aremostly
autotrophic, although heterotrophic algae and algae that enter
symbiotic relations with other organisms are also encountered [1,2].
For instance, the symbiotic relations between algae and fungi take the
form of lichens [3].