The business name is simply that, a name, a way to identify a business, entity, or individual. Due to the potential value of a trademark and the inherent property rights entailed within a trademark, the application for a trademark is much more complicated.
These are two separate questions. Organisms do not serve evolutionary purposes. Traits within organisms affect their survival, which might be thought of as evolutionary purpose. Even that is still not quite right. This question might better ask for ecological purpose. Ants have many such purposes. They clean up dead organisms as scavengers.
An antacid is a substance. An antacid is a substance that will counteract or neutralise an acid. So an alkali such as NaOH is an antacid, but not suitable to take to relieve excess stomach acid. A weaker base is better such as Mg(OH)2 as in milk of magnesia, or Al(OH)3 or CaCO3 can neutralise an acid. http://en.wikipedia.org/wiki/Antacid has stacks of relevant information. 'Chemistry is not just the study of matter; Chemistry is the study which matters!' - Kingchemist.