Extinction _____. only happens above the species level cannot happen to more than one species at a time has happened to over 99% of species that ever lived on earth happens when a species or population dies out.
Nivolumab, marketed as Opdivo, is a medication used to treat cancer.
Nitrofurantoin is an antibiotic that fights bacteria in the body. Nitrofurantoin is used to treat urinary tract infections. Nitrofurantoin may also be used for purposes not listed in this medication guide.