DRUG CLASS AND MECHANISM: Rosuvastatin is an oral drug for lowering blood cholesterol levels. It belongs to a class of drugs called HMG-CoA reductase inhibitors, more commonly referred to as  statins ..RUG CLASS AND MECHANISM: Rosuvastatin is an oral drug for lowering blood cholesterol levels. It belongs to a class of drugs called HMG-CoA reductase inhibitors, more commonly referred to as  statins ..
Zero is an even number, because it is divisible by 2 with no remainder. 0 is neither positive nor negative. By most definitions 0 is a natural number, and then the only natural number not to be positive. Zero is a number which quantifies a count or an amount of null size. In most cultures, 0 was identified before the idea of negative things, or quantities less than zero, was accepted. The value, or number, zero is not the same as the digit zero, used in numeral systems using positional notation.
You can add two natural numbers together, and you will always get another natural number, as in the famous fact that one and one are two. Subtraction, on the other hand, is trickier. If you subtract a number, for example the number 5, from itself, you get something new, something that is not a natural number at all. We call it the number 0 or zero. And if you subtract a number, again say 5, from a smaller number, say 3, then you get something else that is new, namely a negative integer, which in this case is -2, called minus two.