NEET BIOLOGY

Detailed explanation-1: -Euglena is a unicellular organism with a complex internal structure that includes a contractile vacuole that can expel water and a red ‘eyespot’. Photosynthetic forms contain a chloroplast. They possess two flagellae, one long, one short, that can allow the organisms to move.

Detailed explanation-2: -Euglena is a genus of microorganisms belonging to the Protozoa kingdom; it is an unusual example of a unicellular animal with chlorophyll. True algae belong to the Plantae kingdom, and are the simplest plants.

Detailed explanation-3: -Unicellular examples include diatoms, Euglenophyta and Dinoflagellates.

Detailed explanation-4: -Euglenoids are the best-known flagellates of the phylum Euglenozoa. Euglenoids have an outer protein layer called the pellicle. They are unicellular and biflagellate. Examples of euglenoids are Euglena, Trachelomonas, etc.