Which type of worm does not have a simple nervous system? A. Segmented worms
B. Flatworms
C. Annelids
D. Roundworms

A. Segmented worms

Explanation:

Generally, the flatworm avoids light. The nervous system of the earthworm is "segmented" just like the rest of the body. The "brain" is located above the pharynx and is connected to the first ventral ganglion.

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.