How is this an improvement on the traditional, paper coffee filters? a: they are less wasteful and more cost effective because they last longer b: a permanent filter is more expensive than a traditional filter c: they contain plastic which does not break down as easily as paper d: the coffee brewed using permanent filters does not taste as good?
the correct answer is (c), this is because (a) talks about producing energy as of where fat is a form of storing energy. (b) is talking about a cell that controls its surroundings which, as we know, is not the job of fat. that leaves (d) to rule out as it is a textbook definition of an enzyme.
element is a pure substance consisting of one type of atom only. mixture is two or more different substances are mixed but they are not chemically bonded together and may be separated by a physical process such as filtration, distillation and so on.