How artificial and natural pearls created
How artificial and natural pearls created?
Expert
Pearls are made from small strange particles which deposit between shell and mantle of oyster. These particles trigger a defense procedure by organism and they are slowly covered by the calcium carbonate layers secreted by oyster thus giving birth to the pearls.
In artificial production of the pearls a small fragment of the shell covered with the mantle pieces is inserted between shell and mantle of an oyster and a pearl is formed around graft.
Do echinoderms contain an excretory system? How is the excretion completed in such animals? Answer: Echinoderms do not contain an excretory system. Their excretions
Explain the term lichens? How do fungi contribute in this ecological interaction?
Write down the embryonic characteristic which evolutionarily creates echinoderms proximal to chordates?
What are fields required to be activated for the TOR and available check?
What do you mean by the compound eyes?
Specify the hormone that influences the maturation of ovarian follicles after menses?
Write down the types of plant geotropisms? Why do root and stem present opposite geotropisms?
Describe the relation between the thyroid and hypophysis?
What do you mean by blind spot? Illustrate.
There are two factorson which personality determines:1. Biological Factors2. Cultural Factors
18,76,764
1923819 Asked
3,689
Active Tutors
1461179
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!