Question
Lac culture.
✓
Answer
- Lac is a pink coloured resin secreted by dermal glands of female lac insect (Trachardia lacca) that hardens on coming in contact with air forming lac.
- Lac is a complex substance having resin, sugar, water, minerals and alkaline substances.
- Lac insect is colonial in habit and it feeds on succulent twigs like ber, peepal, palas, kusum, babool,
- These plants are artificially inoculated in order to get better and regular supply of good quality and quantity of lac.
- Natural lac is always contaminated and pure form of lac obtained by washing and filtering is called as shellac.
- Lac is used to make bangles, toys, woodwork, inks, mirrors, etc.
- India’s share is 85% of total lac produced in the world.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Describe the functioning of electrostatic precipitator along with a schematic diagram.
How does Entamoeba histolytica causes amoebiosis ?
- With labelled diagrams, depict stages in embryo development in a dicotyledonous plant.
- Endosperm development precedes embryo development. Why?
Answer the following questions: Given below is the T.S. of human ovary. Identify the following in the diagram:
- Corpus luteum.
- Secondary oocyte.
- Antrum.
- Primary follicle.
- Blood vessels.
Vasa efferentia and Vasa deferentia.
Describe the duct system that transports the sperms from seminiferous tubules to the exterior.
Explain transmission of nerve impulse across a synapse.$\#\#\#$ Explain how is impulse transmitted through a synapse?
→Enlist the names of following cranial nerves: I, II, VII, XII
Describe the structure of a mature anatropous ovule or a typical angiospermic.
Medical Termination of Pregnancy (MTP).