A microscopic aquatic eukaryote has two flagella, stiff cellulose plates and photosynthetic pigments. Which observation
Most dinoflagellates possess two differently oriented flagella: one lies longitudinally and the other transversely in a furrow between the cellulose plates. Euglenoids instead have a flexible pellicle and two flagella described as one short and one long.
Ref: NCERT Class 11 Biology Chapter 2: Biological Classification Protista - Chrysophytes and Dinoflagellates