Which of the following are the three main body parts of a mollusk?

• A. Shell, tentacles, radula
• B. Head, thorax, abdomen
• C. Exoskeleton, antennae, wings
• D. Foot, visceral mass, mantle

Answer: (D)

Verified step by step guidance

1. Understand that mollusks are a diverse group of invertebrates that include snails, clams, and squids.
2. Recognize that the body structure of mollusks is typically divided into three main parts: the foot, the visceral mass, and the mantle.
3. The foot is a muscular structure used for movement and anchorage.
4. The visceral mass contains most of the internal organs, including the digestive, excretory, and reproductive systems.
5. The mantle is a significant part of the mollusk's anatomy that secretes the shell (if present) and covers the visceral mass.