What are the characteristic features of Euglenoids?

Explanation

A. 1) Euglenoids : These are unicellular, flagellate, fresh water organisms found in stagnant water.
(2) Cell wall is absent.
(3) The body is covered by thin flexible pellicle.
(4) They bear two flagella, usually one long and one short. They swim actively by flagella.
(5) The anterior part of the cell bears an invagination consisting of cytostome (cell mouth), cytopharynx (gullet) and reservoir.
(6) A photosynthetic stigma or eye spot is present in the reservoir.
(7) Chloroplast is present. The pigments in it are identical to those, present in higher plants. Performs photosynthesis.
(8) In the absence of sunlight they behave like heterotrophs depending on smaller organisms for food.
(9) Reproduction is by longitudinal binary fission Palmella stage is found in Euglena.