Final answer:
Microaerophilic bacteria grow best in high CO2 environments and are often referred to as capnophiles. They flourish in conditions with lower oxygen levels and elevated CO2, such as those created in candle jars.
Step-by-step explanation:
The correct option is D:
The type of bacteria that grow best in high levels of CO2 are d) Microaerophilic bacteria.
Bacteria vary in their oxygen and carbon dioxide (CO2) requirements for optimal growth. Microaerophilic bacteria prefer environments with lower oxygen levels than those in the normal atmosphere and require higher levels of CO2. These bacteria are often referred to as capnophiles because of their preference for increased levels of CO2 which can be achieved by methods like using a candle jar. In this environment, the candle consumes oxygen and increases the concentration of CO2 as it burns, creating conditions conducive to the growth of microaerophilic bacteria.
These bacteria prefer environments with lower levels of oxygen than normal atmospheric conditions. Examples of capnophiles include certain species of Streptococcus and Neisseria.This category also includes organisms such as Helicobacter pylori, which thrive under these special atmospheric conditions.