a) It's caused by bacteria. Pericoronitis is an infection. It's caused by normal oral bacteria, like those found in dental plaque. It's the gum relationship around a partially-erupted tooth that allows pericoronitis to occur.
A futures exchange or futures market is a central financial exchange where people can trade standardized futures contracts; that is, a contract to buy specific quantities of a commodity or financial instrument at a specified price with delivery set at a specified time in the future. These types of contracts fall into the category of derivatives. The opposite of the futures market is the spots market, where trades will occur immediately (2 business days) after a transaction agreement has been made, rather than at a predetermined time in the future.
Oil futures are derivative securities that give the holder the right to purchase oil at a specified price (similar to how stock options work). If you exercise your future by the settlement date, you can purchase oil (crude oil futures trade in units of 1,000 barrels) at the price stated in the futures contract.here are plenty of ways to get in on the oil industry. For example, you can buy stocks of oil and drilling companies. But one of the most profitable â and riskiest â investments you can make is in oil futures. In this article, weâll look at what oil futures are, and then discuss the pros and cons of investing in them.