Possessive Nouns. Possessive nouns are used to indicate ownership. Possessive nouns usually are formed by adding an apostrophe (') and s. When a noun is plural and ends in s, just add an apostrophe ('). If two people own one thing, add the apostrophe and s to the second person only. If two people own separate things, add the apostrophe and s for each person.
Types of antibiotics. There are hundreds of different types of antibiotics, but most of them can be broadly classified into six groups. These are outlined below. Penicillins (such as penicillin and amoxicillin) â widely used to treat a variety of infections, including skin infections, chest infections and urinary tract infections.
Antibiotics are medications used specifically to kill or disable bacteria. All bacteria are prokaryotic. organisms, meaning that their cells are different than cells of the human body. These differences can be exploited, so that antibiotic drugs can kill bacteria without harming us. Most of the bacterial world falls into one of two categories, Gram+ and Gram-, based on Article Summary: Antibiotics are drugs used to fight bacterial infections.