Which statement accurately describes euglenoids?

Presence of a protein-rich layer called pellicle

The correct answer is Option (3) -Presence of a protein-rich layer called pellicle

Euglenoids
Majority of them are fresh water organisms found in stagnant water. Instead of a cell wall, they have a protein rich layer called pellicle which makes their body flexible. They have two flagella, a short and a long one. Though they are photosynthetic in the presence of sunlight, when deprived of sunlight they behave like heterotrophs by predating on other smaller organisms. Interestingly, the pigments of euglenoids are identical to those present in higher plants. Example: Euglena.