Germicide, a substance or agent that kills microorganisms. A disinfectant is a type of germicide that kills germs that cause disease. An antiseptic is sometimes considered a germicide but actually is not because it merely prevents or slows the growth of microorganisms.
For an underwater tourist, whether in a wetsuit or in front of a TV, a major attraction is a coral reef, an amazing ecosystem inhabited by myriad colorful marine creatures. Unfortunately, coral reefs are in danger of disappearing unless immediate steps are taken to preserve this natural wonder. Take this quiz to learn more about what needs to be done.
The leader of the pack doesn't always lead a doomed existence like in the Shangri-Las song. A wolf pack's leader and other members follow defined roles, creating a strong, devoted group.