Why is the face an important body part?

Is ultraviolet radiation is visible or invisible? Can insects see ultraviolet light? What sort of cells occur in the epithelium lining the villi and crypts of Lieberlukn and what are their function? Why are algae important for fish that do not eat algae? Is mount st Helen's caldera vent or craters? When you clamp a single core cable carrying about 500A with an aluminum cable clamp do you have to take care of any effects due to Eddy currents and If so what can you do to minimise these effects.? How much buds can one pot plant preduce? Where did the original atmospheric oxygen come from? What effect does the amount of light have on photosynthesis? What goes black white green black white green? What effects does the elevated temperature have on the other vital signs? What is the molar mass of casein? Can the herpes simplex virus type 1 be spread to the nipple? Why is it important to exaggerate your movements when miming? What did Marie curie doscover? What do you call an element that has lost an electron? What are the device that help to save time? What is the scientific name for natural gas? What is the biggest mammal ever? To which person would this event be of concern the effect on ancient cultures and traditions of people of cutting the old growth forests?