Question

Some bacteria are helpful because they help us breathe by producing _________ .

Answer 1

Oxygen, some bacteria are helpful because they help us breathe by producing oxygen.

Answer 2

Answer:

For producing oxygen.

Explanation:

An example of this is the marine bacteria in Prochlorococcus and Synechococcus, which are part of the phytoplankton. These bacteria are capable of photosynthesis in the sea. One out of every two oxygen molecules produced by photosynthetic processes are produced by these two bacteria.