The ancestors of present-day insects were probably worm-like arthropods with a simple mouth opening near the front of a bilaterally symmetrical body. Over many eons of time, tissues and appendages near the mouth opening came to be adapted for gathering and manipulating bits of solid food. As insects evolved, they became more complex, expanded in range, and adapted to new food resources. The structure and function of their mouthparts changed right along with their evolving diet and life style.
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Loubnan derives from the Phoenician for "white mountain" and denotes Lebanon's mountains, some parts of which remain snow-covered all year. Location and Geography. Lebanon is bounded on the north and east by Syria, on the west by the Mediterranean, and on the south by Israel. Lebanon consists of two mountain chains, the Lebanon and the ante-Lebanon; a narrow coastal strip, where all the major cities lie; and a fertile plain, the Bekaa valley, which lies between the two mountain chains and provides most of the local agricultural produce.