The only independent variable in this experiment is the amount of nitrogen Sarah uses. All of the other variables are dependent on other factor and processes, but Sarah controls the amount of nitrogen that she uses for each plant.
Answer:
I feel like the first one is the best
Explanation:
widening the roads will just cause more cars.
raising the price is most likely not gonna help but its an option.
expanding just means more cars
<span>Two human examples of multiple-allele genes are the gene of the ABO blood group system, and the human-leukocyte-associated antigen (HLA) genes.</span>