How are artificial and natural pearls made
How are artificial and natural pearls made?
Expert
Pearls are made up from small strange particles which deposit among the shell and the mantle of the oyster. Such particles trigger a defense procedure by the organism and they are slowly covered by calcium carbonate layers secreted by the oyster therefore giving birth to pearls.
In artificial production of pearls, a small fragment of shell wrapped with mantle pieces is inserted among the shell and the mantle of an oyster and pearl is made around the graft.
What is the basic difference between lungs and gills?
Briefly describe the Distinguish between exons and introns?
Explain, what is Radula? Explain its function.
Name the living beings which carry out photosynthesis? Name the cell organelle responsible for the absorption of light for photosynthesis method in algae and plants?
Give a brief explanation of hypersensitive reactions.
Hawthorne studies Although the depression and the labor movement were at least, important indirect causes of the practice of the human relations, the Hawthorne studi
Illustrate out the wall resistance of plant cells? Does this resistance assist or make tricky the access of water in the cell?
Expert Systems: This is a computer program which simulates the decision and behavior of a human or an organization which has expert knowledge and experience in the specific field. Usually, such a system has a knowledge base accumulated experience and
Whether extra-embryonic membranes are same in all the vertebrates?
Define the term speciation. Briefly illustrate it.
18,76,764
1960431 Asked
3,689
Active Tutors
1426920
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!