Lets say the plant that formed nodules is Species A, and the one who didn't is Species B.
If the nitrogen is concentrated in one area but at a low concentration, then Species A may have formed nodules because it is closer to the concentrated nitrogen. Species B didn't because the nitrogen that is active is being taken by Species A.
Answer: Vasodilation
Explanation:
vasodilation can be described as the process where the blood vessels widen within the body. Usually, it occurs when smooth muscles in the arteries and major veins relax and its major role is to distribute oxygen to different areas of the body, where it is needed most. It is a natural response of the blood vessels to low levels of oxygen or an increment in body temperature. There are certain health conditions related to vasodilation such as low blood pressure and inflammatory conditions.
The weather man said the relative humidity will be high today
Uneven distribution of charge
b) some bacteria reduce nitrate ion