Question

question 48
what type of bacteria is represented in the diagram?
a obligate anaerobes
b facultative anaerobes
c obligate aerobes
d microaerophiles

Explanation:

• Obligate anaerobes: These bacteria cannot grow in the presence of oxygen. They are typically found at the bottom of the culture tube where oxygen concentration is very low.
• Facultative anaerobes: These bacteria can grow in both the presence and absence of oxygen. They usually distribute throughout the culture tube, with a higher concentration near the top (where oxygen is more available) but also significant growth throughout.
• Obligate aerobes: Require oxygen for growth and are found at the top of the culture tube where oxygen is most abundant.
• Microaerophiles: Require a low concentration of oxygen. They are found in a narrow band below the top of the culture tube.

In the given diagram, the bacteria are distributed throughout the tube. This distribution pattern is characteristic of facultative anaerobes.

Answer:

B. Facultative anaerobes