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.
Morphology (return to top). T. solium is a flattened ribbon like tapeworm that is white in color. Although it is very morphologically similar to the T. saginata, T. solium is slightly shorter and have a modified scolex. The attachment organ, or scolex, has 4 large suckers with a double row of hooks. The adult tape worm grows to be about 6mm in width and 2-7 m in length with about 800 segments called proglottids. As the tapeworm grows in the intestine, mature proglottis called gravid proglottis will be casted off out of the human body.