Euglenophyta are photosynthetic organisms of kingdom Protista which are unicellular aquatic algae. Most of them live in freshwater and motile. The photosynthetic pigments contained inside the organisms are chlorophylls a and b.
Some species are heterotrophic and can ingest or absorb their food. They reproduce via longitudinal cell division.
Chlorophyll a -> blue-green pigment; it is the most common photosynthetic pigment. It is the specific chlorophyll used in oxygenic photosynthesis by eukaryotes, cyanobacteria, plants and prochlorophytes.
Chlorophyll b -> yellow-green pigment; helps in the photosynthesis by absorbing the light energy. It is the more soluble chlorophyll because of its carbonyl group in its structure.