Question

Why is a root nodule a nutritional adaptation of a plant?

a) It provides storage for excess nutrients.
b) It enables the plant to absorb more water.
c) It facilitates a symbiotic relationship with nitrogen-fixing bacteria.
d) It helps in the uptake of minerals from the soil.

Answer 1

A root nodule is a nutritional adaptation of a plant as it facilitates a symbiotic relationship with nitrogen-fixing bacteria, enhancing the plant's nutrition and growth.

Step-by-step explanation:

A root nodule in a plant is a nutritional adaptation because it facilitates a symbiotic relationship with nitrogen-fixing bacteria. The nodules on the roots of legume plants, such as peas and beans, contain bacteria called rhizobia. These bacteria have the ability to convert nitrogen gas from the atmosphere into a form that plants can use, which helps the plant obtain a vital nutrient. This mutualistic relationship between the plant and bacteria enhances the plant's nutrition and growth.