Cholesterol, testosterone, and estrogen are
all examples of which are chemical
messengers that the body uses.
A. sugars
B. steroids
C. proteins

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.

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.