مؤلف: Annabella Ferro

Stress may be defined as any negative effect or condition that a living organism may suffer. Abiotic stresses, such as salinity, drought, high and low temperatures, ozone, heavy metals, low concentra …

Presidential succession was widely considered a settled issue prior to the terrorist attacks of September 11th, 2001. These events demonstrated the potential for a mass "decapitation" of bo …