Grams would be the correct answer hope this helps!
Usually patient's with pica are missing a nutrient in their diet..blood testing is the usual method to discover what nutrients are missing.could also b due to a mental illness..
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:
wrong subject and none of theses is the answer :(