Question

The method of insertion of foreign particles between the mantle and the shell of pearl oyster for the stimulation of pearl formation was introduced in Japan by
A. Katu
B. Mikimoto
C. Von Mohl
D. Haeckel

Answer 1

Hint: A pearl is a glistening, hard object produced within the soft tissue of shelled mollusk. The pearl is composed of calcium carbonate in minute crystalline form which has deposited in concentric layers. The pearl is obtained by three methods which are natural, cultured or farmed and imitation pearls.

Complete answer:
All shelled mollusks with the natural process can produce pearls when an irritating microscopic object becomes trapped within its mantle folds. Many hundreds of pearl oysters or mussels must be opened and thus killed to find even one wild pearl. The thinner and numerous the layers in the pearl, the finer will be the luster of the pearl. Overlapping of successive layers causes iridescence that pearl display which breaks up light falling on the surface.
Natural pearls are obtained in the wild and are extremely rare. These pearls are the most valuable and originate naturally without any human interference. The cultured or farmed pearls are obtained from pearl oysters and freshwater mussels and are mostly sold in the market and were first introduced in Japan by Mikimoto. Imitation pearls are also sold in the market but are inexpensive as their quality of iridescence is very poor and are easily distinguished from the natural pearl.

Hence, the correct option is B. Mikimoto.

Note: Mikimoto was a Japanese entrepreneur who is credited with creating the first cultured pearl and then started the cultured pearl industry with the establishment of his luxury pearl company Mikimoto.