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Tube feet is the locomotory organ that occurs in star fishes.

1. a) True for all echinoderms
2. b) True for star fishes only
3. c) True for sea urchins only
4. d) True for brittle stars only

Correct answer: b) True for star fishes only

Solution

Starfishes use tube feet in their ambulacral grooves for movement and attachment. While other echinoderms may have tube feet, the statement as written is specifically true for starfishes only.

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