What are the characteristic features of Euglenoids?

Question.
What are the characteristic features of Euglenoids?

Solution:
Some characteristic features of Euglenoids are as follows.  
  • Euglenoids (such as¬†Euglena) are unicellular protists commonly found in fresh water.
  • Instead of cell wall, a protein-rich cell membrane known as pellicle is present.
  • They bear two flagella on the anterior end of the body.
  • A small light sensitive eye spot is present.
  • They contain photosynthetic pigments such as chlorophyll and can thus prepare their own food. However, in absence of light, they behave similar to heterotrophs by capturing other small aquatic organisms.
  • They have both plant and animal-like features, which makes them difficult to classify.

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