Biology (NTSE/Olympiad)  

3. Improvement In Food Resources

Exotic Variety :

Exotic Variety :
A. mellifera (Italian bee)
Lac Culture :
Human beings obtain commercial products from lac insects. Lac is secreted as a protective covering mostly by the females. The encrustation is scraped and processed to obtain lac. Lac is a resinous secretion of Laccifer lacca or lac insect which feeds on the sap of a number of forest trees
Seri Culture :
If commercial product like silk are obtained from silkworms. Silk is fibrous secretion which is secreted by caterpillar over it during coccon formation. Common silk is Mulberry silk. Mullberry silk is obtained from Bombyx mori which feeds on leaves of Mulberry (Morus alba). Mulberry specially grown for silkworm is called Moriculture.
Pearl Culture :
Pearl is produced by members of phyllum mollusca. Pearl producing Indian variety is Pinctada vulgaris. Father of Pearl Industry is Kokichi Mikimoto.

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