T cell mediated autoimmune disease tend to be limited to a few organs and usually are not systemic because the autoimmune reactions are typically directed against cellular antigens with restricted tissue distributions. An example to T cell mediated hypersensitivity reaction against environmental antigen is contact sensitivity to chemicals.
Pollutions, land fills, deforestation, air pollution, and nuclear waste
Answer:
1. Covalent bonds occur between nonmetal and nonmetal.
2. In a neutralization reaction, the acid and base results in salt and water that are neutral in pH
3. C2H6 is ethane!
4. The correct name of CaO is oxocalcium
I'm glad to help, but please still try to use the naming rules!
Hope this helps :)
Gills. Gills greatly increase the surface area for gas exchange. ... Gills are very efficient at removing oxygen from water: there is only 1/20 the amount of oxygen present in water as in the same volume of air. Water flows over gills in one direction while blood flows in the opposite direction through gill capillaries.