Stem cell therapies are not new. Doctors have been performing bone marrow stem cell transplants for decades. But when scientists learned how to remove stem cells from human embryos in 1998, both excitement and controversy ensued.
The excitement was due to the huge potential these cells have in curing human disease. The controversy centered on the moral implications of destroying human embryos. Political leaders began to debate over how to regulate and fund research involving human embryonic stem (hES) cells.
Newer breakthroughs may bring this debate to an end. In 2006 scientists learned how to stimulate a patient's own cells to behave like embryonic stem cells. These cells are reducing the need for human embryos in research and opening up exciting new possibilities for stem cell therapies.
A cell spends most of its time in prophase because in prophase, the cell's chromatins are condensing and coiling into chromatids. But a cell spends more time in interphase than prophase.
Because they grow in shallow coastal waters, oysters are likely to be polluted. Oyster exists in marine or brackish habitats. There are many different types of oysters, some which are consumed by humans, others that produce pearls and there are the windowpane oysters which are harvested for making decorative objects as their shells are translucent.
B. population density.. I think....