Question

multiple choice question

a microbe that requires carbon dioxide levels higher than those present in the normal atmosphere is called a(n) ______.

mesophile
capnophile
anaerobe
psychrophile

Explanation:

Identify the core definition

A microbe requiring elevated carbon dioxide (\(\text{CO}_2\)) levels compared to normal atmospheric levels.

Evaluate the options

• mesophile: Microbes that grow best at moderate temperatures.
• capnophile: Microbes that thrive in high concentrations of carbon dioxide.
• anaerobe: Microbes that do not require oxygen for growth.
• psychrophile: Microbes capable of growth and reproduction in cold temperatures.

Select the correct term

The prefix "capno-" refers to carbon dioxide, making "capnophile" the correct term.

Answer:

• mesophile
• capnophile (Correct answer)
• anaerobe
• psychrophile