Studying the difference in prevalence of drug-related violence in states with and without medical marijuana use is an example of an ecologic study. a. Trueb. False

sand 60

clay 10

silt 30

sandy loam should be dominated by the sand. as the amount of sand increased, the amount of slit needed to anchor the plants' roots to the sand will also be increased. even though the amount is very little, 10% part of clay is still necessary for proper oxidation.

answer; i believe the correct answer is (data); /// good luck