Which animals are segmented worms?

Which animals are segmented worms?

• A. Jellyfish
• B. Octopus
• C. Earthworms
• D. Coral

Answer: (C)

Segmented bodies, or metamerism, are a hallmark of annelids. Earthworms are classic examples; their bodies are made of many repeating segments that house parts of their nervous system, digestive tract, and circulatory system, and they move with peristaltic waves aided by tiny bristles called setae. This segmentation provides flexibility and precise control of movement. Jellyfish and corals are cnidarians with radial symmetry and no segmentation, so they lack metamerism. An octopus is a mollusk with a soft body and no true repeating body segments. So, earthworms are the segmented worms.

Segmented bodies, or metamerism, are a hallmark of annelids. Earthworms are classic examples; their bodies are made of many repeating segments that house parts of their nervous system, digestive tract, and circulatory system, and they move with peristaltic waves aided by tiny bristles called setae. This segmentation provides flexibility and precise control of movement. Jellyfish and corals are cnidarians with radial symmetry and no segmentation, so they lack metamerism. An octopus is a mollusk with a soft body and no true repeating body segments. So, earthworms are the segmented worms.