Question
Biology Question on biological classification
An example for symbiotic bacteria
A
Erwinia amylovora
B
Rhizobium leguminosarum
C
Xanthomonas campestris
D
Agrobacterium tumefaciens
Answer
Rhizobium leguminosarum
Explanation
Solution
Rhizobium leguminosarum is a small, flagellate gram-negative, aerobic, rod- shaped bacteria. It persists saprophytically in the soil until it infects a root hair or damaged epidermal cell. After infection, Rhizobium establishes a symbiotic relationship with legumes living inside the root nodules and fixes large amount of nitrogen, much of which his made available to the plant.