Why do plant cells have a cell wall made of cellulose?

What is the weather in whitby normally like? Is the word pure noun? Which of these humanities would not be considered a social science? An organism's genetic makeup or allele combinations? Consisting of elements that are the same kind of nature? Which climate produce the most rapid chemical weathering of rock? What is the name for element Uuq? What sizes of fuse would you use in different types of household electrical equipment? What does depth mean in measuring a table? Can you describe how the metal atoms in an alloy are mixed? What produces chemical energy? What units does molar heat of vaporization have? In the following conservation which discussion technique does Daniel most clearly show? When were carbon dioxide levels as high as they are today? Fluorine has an atomic number of 9 and an atomic weight of 19 so how many electrons are present in an uncharged fluorine atom? How many cm in 5ft and 8 inch? What happens if you use non-porous cleaner on porous surface? Why country has code 0068? Why don't convection currents occur in earth's inner core? Is hold a transition word?