3
Question
True pearl is made up of
True pearl is made up of
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Solution
The correct option is A Many layers
Pearl is secreted by the mantle of the pearl oyster. Nacreous layer is the innermost layer of the shell and is better known as the mother of pearl. Any sort of foreign body enters and gets between the mantle and shell, it becomes enclosed in a sac of mantle epithelium. This foreign body now acts as an irritant and stimulates the mantle epithelium to secrete many concentric layers of nacre around this foreign body which hardens and forms the pearl.Thus, the correct answer is option C.
Pearl is secreted by the mantle of the pearl oyster. Nacreous layer is the innermost layer of the shell and is better known as the mother of pearl. Any sort of foreign body enters and gets between the mantle and shell, it becomes enclosed in a sac of mantle epithelium. This foreign body now acts as an irritant and stimulates the mantle epithelium to secrete many concentric layers of nacre around this foreign body which hardens and forms the pearl.
Thus, the correct answer is option C.
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