Dr. Lange discovers a colony of bacteria living in an
extremely acidic environment. While observing the colony,
she finds that the bacteria are autotrophs.

Which best describes the bacteria discovered by the
scientist?

They are probably archaebacteria because they are
autotrophs.
They are probably eubacteria because they are
autotrophs.
They are probably eubacteria because the colony lives in
an extreme environment.
They are probably archaebacteria because the colony
lives in an extreme environment.