EVERYDAY SCIENCE

Detailed explanation-1: -Answer: The nitrogen-fixing bacteria present in root nodules of leguminous plants are rhizobium bacteria.

Detailed explanation-2: -Legumes are able to form a symbiotic relationship with nitrogen-fixing soil bacteria called rhizobia. The result of this symbiosis is to form nodules on the plant root, within which the bacteria can convert atmospheric nitrogen into ammonia that can be used by the plant.

Detailed explanation-3: -Rhizobium is a nitrogen-fixing bacteria found in the root nodules of pulses like peas, green gram etc. The bacteria fix atmospheric nitrogen and provide it to the plants to absorb. In return, the plants provide shelter and nutrition to the bacteria.

Detailed explanation-4: -Inside the nodules are cells filled with Rhizobium bacteria. These bacteria fix atmospheric nitrogen (N2) by converting it into ammonia compounds (NH4OH). Excess ammonia is expelled into the soil and plant tissues surrounding the nodule.

Detailed explanation-5: -Root nodules are commonly found in the leguminous plants or plants belonging to the family Fabaceae. Examples are peas, beans, soybean, alfalfa, clover, etc. Some non-leguminous plants also develop root nodules such as Parasponia is nodulated by Rhizobia, alder and bayberry are nodulated by Frankia.