NEET BIOLOGY

Detailed explanation-1: -Euglena move by a flagellum (plural flagella), which is a long whip-like structure that acts like a little motor. The flagellum is located on the anterior (front) end, and twirls in such a way as to pull the cell through the water. It is attached at an inward pocket called the reservoir.

Detailed explanation-2: -They possess two flagellae, one long, one short, that can allow the organisms to move. Euglena are also able to move by means of changing its shape (see video links). Outside the cell membrane is a flexible, protein-based structure called a pellicle.

Detailed explanation-3: -A typical specimen of Euglena gracilis (Fig. 1A) is around 50m in length. The flagellum they use for locomotion, which is slightly shorter than its body, beats by spinning at ∼40 Hz in close proximity to the cell body (Movie S1).

Detailed explanation-4: -Euglena move with a single flagellum, so they are called flagellates.

Detailed explanation-5: -Euglena have two flagella rooted in basal bodies located in a small reservoir at the front of the cell. Typically, one flagellum is very short, and does not protrude from the cell, while the other is long enough to be seen with light microscopy.