A blood bank refused to accept blood from a potential donor who had just had his teeth cleaned by a dental hygienist. Why did they refuse the blood

High amounts of fluoride

Explanation:

Teeth cleaning agents can contaminate one's blood with fluoride, something that it is only healthy to accumulate a small amount of.

answer; ///i believe that the correct answer is (d); ///

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.