Biology · Animal Kingdom
Which of the following statements is anatomically correct regarding the body plan and organs of a typical mollusc?
- 1The visceral mass is exclusively modified for rapid movement and is entirely located outside the shell protective layer.
- 2The muscular foot contains the majority of the internal digestive, excretory, and reproductive organs.
- 3The mantle is a soft, spongy layer of skin that secretes the calcareous shell and encloses the visceral mass.✓
- 4The calcareous shell is secreted by the visceral mass and functions primarily in active locomotion.
Correct answer
The mantle is a soft, spongy layer of skin that secretes the calcareous shell and encloses the visceral mass.
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