We have to skip this until we're back in school.
Use word decoding to see what you can figure out about the following phrases:
Obligate aerobe (*Hint: what does obligated mean?)
Obligate anaerobe (*Hint: what does the prefix 'an' mean?)
Facultative anaerobe
Which term matches with each picture above? *Hint: There is more oxygen near the surface of the test tube than at the bottom.
Come up with an hypothesis to explain why the bacteria in the third test tube are not evenly distributed.