Does anyone know these 5. how do bacteria contribute to an ecosystem? (1 point) some bacteria reduce the number of parasites infesting organisms in an ecosystem. some bacteria provide nutrients and raw materials for organisms in an ecosystem. some bacteria are a primary food source for most of the consumers in an ecosystem. some bacteria provide protection from viral infections for the organisms in an ecosystem. 6. which of the following roles of bacteria is not a benefit to human bodies? (1 point) digesting food preventing diabetes making vitamins acting as a pathogen 7. two ways bacteria cause disease is by using the cells of the organism they infect as food and by (1 point) making antibiotics. releasing toxins. releasing viruses. releasing disinfectants. 8. antibiotics are often effective treatments for diseases caused by (1 point) bacteria. viruses. some bacteria and some viruses. all bacteria and all viruses. 9. what is one reason biologists have difficulty classifying proti