Which of the following statement is incorrect about Molluscans?
Correct answer: D. They move by tube feet
- A. They are surrounded by single or double pieces of hard skeleton.
- B. Their shell grows as the animal grows.
- C. They have hydrostatic skeleton.
- D. They move by tube feet
Explanation
Molluscs may have a shell, their shell grows with the animal, and their soft bodies can use a fluid-supported hydrostatic skeleton. Tube feet are characteristic of echinoderms such as starfish, not molluscs, so d is incorrect.
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About Human Skeleton
The human skeleton provides support, protects organs, enables movement with muscles and stores minerals while bone marrow produces blood cells. Questions cover the axial and appendicular skeleton, types of bones and joints, cartilage, ligaments and tendons, and the difference between fixed, slightly movable and freely movable joints.
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