Euglenids are a well-known group of flagellates that are excavating eukaryotes belonging to the phylum Euglenophyta, and their cell structure is typical of that phylum.
With a few marine and endosymbiotic members, they are mostly found in freshwater, especially when it is rich in organic compounds.
Chlorophyll a is chlorophyll that aids in the oxygenic photosynthesis process.
The wavelengths of violet-blue and orange-red light absorb the most energy, whereas green and near-green light absorb the least.