LOCATION: Taiga, also known as coniferous or boreal forest, is the largest terrestrial biome on earth. It extends in a broad band across North America, Europe, and Asia to the southern border of the arctic tundra.OCATION: Taiga, also known as coniferous or boreal forest, is the largest terrestrial biome on earth. It extends in a broad band across North America, Europe, and Asia to the southern border of the arctic tundra.
Xerophthalmia is a medical condition in which the eye film is reduced and the eye is incapable of producing tears.This appears when there is something wrong with the lacrimal glands and their main function, meaning to produce tears, is affected.erophthalmia is also known as the dry eye syndrome or conjunctivitis arida and it can affect the quality of life to an extensive level.
Primitive neuroectodermal tumor (PNET) is a malignant (cancerous) neural crest tumor. It is a rare tumor, usually occurring in children and young adults under 25 years of age.The overall 5 year survival rate is about 53%.It gets its name because the majority of the cells in the tumor are derived from neuroectoderm, but have not developed and differentiated in the way a normal neuron would, and so the cells appear primitive. PNET belongs to the Ewing family of tumors.he overall 5 year survival rate is about 53%. It gets its name because the majority of the cells in the tumor are derived from neuroectoderm, but have not developed and differentiated in the way a normal neuron would, and so the cells appear primitive.