What part of the echinoderm body helps them detect food?

• A. Spines
• B. Tube feet
• C. Madreporite
• D. Pedicellariae

Answer: (B)

Verified step by step guidance

1. Understand that echinoderms are a group of marine animals that include starfish, sea urchins, and sea cucumbers. They have a unique water vascular system that plays a crucial role in their movement and feeding.
2. Recognize that tube feet are small, flexible, and hollow appendages that are part of the water vascular system. They extend from the body of echinoderms and are used for locomotion, attachment, and feeding.
3. Consider the function of tube feet in detecting food. Tube feet have sensory capabilities that allow echinoderms to sense their environment, including the presence of food particles.
4. Differentiate tube feet from other parts of the echinoderm body, such as spines, madreporite, and pedicellariae. Spines are primarily for protection, the madreporite is involved in water intake for the vascular system, and pedicellariae are small pincer-like structures used for cleaning and defense.
5. Conclude that tube feet are the part of the echinoderm body that helps them detect food due to their sensory and locomotive functions, which enable them to explore their surroundings and capture food.