Bean plants significantly change the development of their roots when they make nodules, as well as diverting energy and resources for this change. given the critical role of normal roots, why would the plant make this change?

The roots organ is genereally placed under the soil and may undero variious modifications. The roots are present in plant that help them to absorb water and nutrient from the soil.

Some plant roots contains the bacteria that helps in the conversion of nitrogen into ammonium ions. The plants changes the roots because the rhizobium present in plant roots helps in the conversion of nitrogen so that it can be used by the plants. The Rhizobium produces ammonium (NH4+) ions.

Theory in science explains why something happens, whereas the everyday term for theory is just something that can be proved but it is not a fact.