Why is a maintenance so important for all structures?

What is the most common chemical in a plants cell wall? One of the drawbacks of electronic funds transfer is? What continent is 20 degrees north and 60 degrees east? What is the input structure in the axon? How dangerous can hurricanes be? When you say an electron is in its ground state what does that mean? What is physical characteristics of Mount Vesuvius? What molecules join in long chains to make cellulose? Are ther plants and trees on other planets? If 1 cm on a map represents 25000 cm on the ground the scale of the map is? 198 equals how many kilogram? How many liters are contained in a 1.00 cubic meter container and what would it weigh if it were filled with water? How do scientists tell when an el nino will occur? Who used a telescope to make detailed observations of the stars ad planets? The tectonic plates float on what layer of earth? Definition of atomic mass and atomic number? What states that when one form of energy is transformed to another no energy is destroyed? What is the specialized function of turnip? If you have been asked to accurately measure out 50 cubic centimetre of a liquid experimentwhich piece of glassware wouls you use explain and justify your answer? Is there neon in highlighters?