Nitrogen fixing micro-organisms in leguminous plants live symbiotically in the

Explanation

Leguminous plants are plants that belong to the family Leguminosae. They include beans, peas, lentils, peanuts, and clover. These plants can grow in nitrogen-poor soil, thanks to their mutualistic relationship with nitrogen-fixing bacteria. Nitrogen fixation is the process by which atmospheric nitrogen is converted into a form that can be used by plants. The nitrogen-fixing bacteria live in nodules on the roots of leguminous plants. These nodules are formed from the plant's own cells in response to the presence of the bacteria. The bacteria are able to convert atmospheric nitrogen into ammonia, which is then used by the plant to make amino acids and other nitrogen-containing compounds. The correct answer to the question is option C: root nodules. The nitrogen-fixing micro-organisms live symbiotically in the root nodules of leguminous plants, not in the other options (branch roots, tap roots, or root hairs). Therefore, option C is the correct answer. Overall, nitrogen fixation is an important process for plant growth and the nitrogen cycle in general. It allows for the conversion of atmospheric nitrogen into a form that can be used by living organisms, including plants.