Multiple choice

In which of these groups, are the oldest living fossils placed?

  1. Archaebacteria

  2. Mycoplasma

  3. Rickettsia

  4. All the above

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

Archaebacteria are considered the oldest living fossils on Earth. They thrive in extreme environments similar to early Earth conditions and are believed to resemble the earliest life forms. Mycoplasma and Rickettsia are more evolved bacteria.

Keep practicing — related questions