The serving size must be what is customarily consumed. Foods meeting this criterion may use free of calories, no calories, calorie-free, zero calories, trivial source of calories, without calories, dietarily insignificant source of calories or negligible source of calories on the food label. Video of the Day
Body Symmetry of Phylum Chordata Although chordates come in many shapes and sizes, they share the four characteristics listed above and they also all have bilateral symmetry. If you divide a chordate in half, you will get two equal pieces that are mirror images of each other.
Another characteristic of chordates is a structure called the endostyle, a ciliated groove on the ventral wall of the pharynx that secretes mucus and traps small food particles that enter the pharyngeal cavity. The endostyle is present in tunicates and lancelets.