How many molecules of carbon dioxide are required to produce a 6-carbon sugar?

24 molecules

Explanation:

All the carbon in the sugar comes from CO2. 6 molecules of CO2 need to be fixed to form 1 molecule of glucose (a 6 carbon sugar). So 24 molecules of CO2 should enter the calvin cycle to produce a sugar that has 24 carbon atoms.

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.