You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "bacteria that die in the presence of oxygen are called?" whose answer is anaerobic organism or anaerobe.
Each document should contain about 30 words, and these documents should contain useful information.

Query: bacteria that die in the presence of oxygen
Useful Output:

Doc 1: Facultative anaerobes can change their metabolic processes depending on the presence of oxygen, using the more efficient process of respiration
Doc 2: Bacteria and many microorganisms are very sensitive to oxygen concentrations. Some will only grow in its presence and are called obligate aerobes.
Doc 3: Aerobic respiration occurs in the presence of oxygen and in most cells most of the time. · Anaerobic respiration occurs without oxygen and much less frequently
Doc 4: Why do anaerobic bacteria die in the presence of oxygen  See what the community says and unlock a badge. close.
Doc 5: These enzymes detoxify peroxide and oxygen free radicals produced during metabolism in the presence of oxygen. Anaerobic respiration includes glycolysis and.