6
Question
Which of the following characteristics relates to molluscs?
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Solution
The correct option is D All of the above
Molluscs feed by means of a peculiar rasping tongue called a radula. The radula is a tiny little chainsaw-like structure made of chitin. They possess an osphradium which is a receptor organ formed of a specialised sensory epithelium. It is located in mantle cavity and serves as an olfactory organ. They have soft bodies which are a hard shell made of calcium carbonate which functions as an exoskeleton. This shell is secreted by a thin sheet of tissue called the mantle, which encloses the internal organs.
So, the correct answer is option D.
Molluscs feed by means of a peculiar rasping tongue called a radula. The radula is a tiny little chainsaw-like structure made of chitin. They possess an osphradium which is a receptor organ formed of a specialised sensory epithelium. It is located in mantle cavity and serves as an olfactory organ. They have soft bodies which are a hard shell made of calcium carbonate which functions as an exoskeleton. This shell is secreted by a thin sheet of tissue called the mantle, which encloses the internal organs.
So, the correct answer is option D.
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