Euglenoids have a flexible pellicle composed of

Euglenoids have a flexible pellicle composed of. carbohydrates. lipids. protein.  The pellicle is composed of fibrous stretchy protein, small amount of lipid or/and carbohydrates and maintains the same shape

a set of stripes of helically arranged proteins located in the cytoplasm, immediately below the plasma membrane.

Explanation:

The euglenoids, as they are called, are single-celled flagellates and well known through the genres of Euglena, Phocus, and Trachelomonas. Molecular evidence suggests that early euglenophiles performed phagocytosis (encompassing solid particles). Molecular evidence suggests that early euglenophiles performed phagocytosis (encompassing solid particles). Approximately one third of them contain chloroplast, and about two-thirds are heterotrophic, which feed on of solid particles or by the absorption of dissolved organic compounds.

Euglenoids occur in marine or freshwater environments. Despite chlorophyll forms, there are colorless and saprophytic forms. They can occur in moist soils, mud, and dirt. The pellicle forms a film, which may be flexible or rigid. The pellicle allows the cell to change its shape and facilitates movement in muddy environments where movement is difficult.