What consists of sperm cells and egg cells?

the answer is yes, they are born/created, then they grow to their limit then produce offspring, then die.

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.