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.
A tissue is a mass of similar or dissimilar cells performing a common function. The body of a vascular plant is composed of dermal tissue, Ground tissue and Vascular tissue. Dermal Tissue (Skin). Dermal Tissue is protective in function. Basing on its origin, it is classified into two types Epidermis and Periderm.Epidermis: This is the primary surface tissue of the entire plant.he body of a vascular plant is composed of dermal tissue, Ground tissue and Vascular tissue. Dermal Tissue (Skin). Dermal Tissue is protective in function. Basing on its origin, it is classified into two types Epidermis and Periderm.