Multiple choice

Which nutritional type of organisms are nitrifying bacteria?

  1. Photoautotrophs

  2. Chemoautotrophs

  3. Heterotrophs

  4. Lithotrophs

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nitrifying bacteria are chemoautotrophs. They gain their energy by chemical oxidations (chemo-) and they are autotrophs (self-feeders) because they do not depend on pre-formed organic matter.