Question

What is the function of the rich protein layer found in Euglena instead of a cell wall?

• A. It contributes to photosynthesis.
• B. It helps in locomotion.
• C. It contributes to flexibility.
• D. It allows the organism to be heterotrophic in the absence of sunlight.

Answer 1

Answer: (C)

Euglenoids are freshwater organisms. 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.