Dna was proven as the hereditary material through the work of hershey and chase. true 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.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.