Question

Nodulated roots bearing Family is
A. Mimosoideae.
B. Caesalpinioideae.
C. Papilionaceae.
D. Solanaceae.

Answer 1

Nodule is a spherical mineral concretion that is different from the structure in which it occurs and can be isolated from it. Nodules are normally elongated and have a knobby irregular appearance, and they are aligned parallel to the bedding. Nitrogen fixation is the name for this process that helps to fix nitrogen. These are found in the leguminous plants.

Complete answer:
Option A: The Mimosoideae family consists of tropical and subtropical plants, flowers, lianas, and shrubs. They belong to a clade in the flowering plant family Fabaceae that was formerly classified as a subfamily or family.
So, option A is incorrect.
Option B: Caesalpinioideae is a subfamily of the large Fabaceae or Leguminosae family of plants. Caesalpinia is the common name for this plant. The peacock flower subfamily is another name for it.
So, option B is incorrect.
Option C: Bacteria are found in the roots of several Papilionaceae in complexes such as root nodules. Rhizobia bacteria have the capacity to take nitrogen gas (${N_2}$) from the environment and transform it to a source of nitrogen that the host plant can use ($NO$ or $N{H_3}$). A symbiotic relationship exists between the legume as a host and Rhizobia as a source of functional nitrate.
As a result, option C is right.
Option D: A variety of widely collected or cultivated species belong to the Solanaceae family. Solanum, which includes the potato, is the most economically important genus of the family.
So, option D is incorrect.

Hence, Option C is the correct answer.

Note:
Root nodules are nitrogen-fixing bacteria that grow in symbiotic relationships on the roots of plants, particularly legumes. Plants that are capable of forming a symbiotic relationship with a host-specific strain of bacteria known as Rhizobia form a symbiotic relationship with Rhizobia under nitrogen-limiting conditions. The oxygen sensitivity of nitrogen fixation in the nodule is very high. In general, nodules grow as a result of soil bacteria infecting the roots. Infection refers to the complicated mechanism of Rhizobia infecting plant roots. Nodulation is the term for the dynamic mechanism of nodule formation.