AP BIOLOGY

Detailed explanation-1: -Worms are invertebrate animals with bilateral symmetry.

Detailed explanation-2: -Bilateral symmetry means that if the worm were sliced from top to bottom along the anterior-posterior midline, both sides (lateral halves) would be identical. Bilateral symmetry allows animals to move more efficiently and in a more directed manner.

Detailed explanation-3: -Flatworms, like humans, exhibit bilateral symmetry.

Detailed explanation-4: -Hence, worms don’t have radial symmetry.

Detailed explanation-5: -Examples of animals that possess bilateral symmetry are: flatworms, common worms ("ribbon worms"), clams, snails, octopuses, crustaceans, insects, spiders, brachiopods, sea stars, sea urchins, and vertebrates.