The whale's ability to hold its breath is, in a way, an evolutionary one-two punch: (1) The high concentration of myoglobin allows it to spend more time underwater in between breaths, and (2) the myoglobin's positive charge ensures the proteins don't clump together and kill the animal.
Lesson Summary. Let's review. A flagellum is a whip-like structure that allows a cell to move. They are found in all three domains of the living world: bacteria, archaea, and eukaryota.While all three types of flagella are used for locomotion, they are structurally very different.The eukaryotic flagellum is a long, rod-like structure that is surrounded by an extension of the cell membrane like a sheath.t is similar to a cilium in structure, though cilia generally move in a back and forth motion, as opposed to the corkscrew movement of a flagellum. The eukaryotic flagellum is a long, rod-like structure that is surrounded by an extension of the cell membrane like a sheath.
Cilia are similar to flagella in structure and function, but a cilium is shorter and moves differently. A ciliated cell usually has hundreds or thousands of cilia, which move in unison like little oars.Sometimes a cell will also use cilia to funnel food into an oral groove. flagellum is a whip-like structure that allows a cell to move. They are found in all three domains of the living world: bacteria, archaea, and eukaryota. While all three types of flagella are used for locomotion, they are structurally very different.