AP BIOLOGY

Detailed explanation-1: -Most vertebrates show bilateral symmetry.

Detailed explanation-2: -Vertebrates possess bilateral symmetry by their very nature; the structure of vertebrae themselves are bilateral. But arthropods are also bilaterally symmetrical, and it is not beyond imagining that a sufficiently evolved arthropod might produce an industrial-technological civilization.

Detailed explanation-3: -All vertebrates display bilateral symmetry. Fish, and other bilaterally symmetrical animals, have different bodily regions such as anterior, posterior, dorsal, and ventral portions. The anterior refers to the top of the body, typically where the head is observed.

Detailed explanation-4: -A condition in which the right and left sides of an item (e.g., a shape or an animal) are mirror images of one another. For example, since the right side of the human body generally mirrors the left side, humans are bilaterally symmetric.

Detailed explanation-5: -All true animals, except those with radial symmetry, are bilaterally symmetrical.