3 things that you learned about Particle Theory and Wave Theory of Light

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.

if your own plato the answer is b. the fern transitioned from sporophyte generation to gametophyte generation.