During the 7th century the power of the Eastern Roman (Byzantine) Empire was challenged by the Sassanids of Persia, who invaded Egypt in 616. They were expelled again in 628, but soon after, in 642, the country fell to the Arabs, who brought with them a new religion, Islam, and began a new chapter of Egyptian history.
the bark protcts the zylem and the phloem fron infection.bark is like our skin and if we cut off some of it and didnt keep it clean it would become infected.you could shave off a couple of inches and a tree may live depending on its age but if its a sapling and about 3 to 5 inches in diameter it would die eventually.
Dermal tissue. Dermal Tissue. generally a single layer of cells. They are tightly packed and covered with a trans parent, waxy, material called the cuticle. Vascular Tissue. functions in support and trans portation of food and water throughout the plant.Ground Tissue.ermal tissue. Dermal Tissue. generally a single layer of cells. They are tightly packed and covered with a trans parent, waxy, material called the cuticle. Vascular Tissue. functions in support and trans portation of food and water throughout the plant. Ground Tissue.