Question
Biology Question on biological classification
What is true for archaebacteria
A
all halophils
B
all photosynthetics
C
all fossils
D
oldest living beings.
Answer
oldest living beings.
Explanation
Solution
Archaebacteria are believed to have originated at a time when there were extreme conditions in the biosphere. Even today they are found in environments where other kinds of bacteria cannot survive. So they are considered to be the oldest of the living fossils. Eg. Methanobacterium, Methonococcus etc. All of them are not halophiles. Only some forms like Halobacterium, Halococcus can survive under extreme saline conditions. All of them are not fossils because many forms are still surviving and flourishing.