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Euglenoids

Habitat: Primarily freshwater organisms inhabiting stagnant water.
Cell Structure: Lack a rigid cell wall; possess a protein-rich layer called a pellicle, providing flexibility.
Movement: Equipped with two flagella, one short and one long, for locomotion.
Nutrition: Exhibit mixotrophic nutrition:
- Photosynthetic in the presence of sunlight (autotrophic).
- Heterotrophic in the absence of sunlight, predating on smaller organisms.
Pigments: Contain photosynthetic pigments identical to those found in higher plants (chlorophyll a and b).
Example: Euglena