Free round worms have a more complex body system compared to parasitic roundworms because they are independent and exist as a whole organism. Parasitic round worms are less complex because they are dependent on their hosts for survival.
For the answer to the question above, I think that the A Type III Marine Sanitation Device must have a closed and secured Y valve when boating on inland waters.
I hope my answer helped. Have a nice day ahead.
Auxin controls geotropism and phtotropism!
You can use ( lots of non-cells are eukaryote ) hope this helps
Mantle
In mollusks with shells, the outer cells of the mantle secrete
calcium carbonate and conchiolin to form the shell. The mantle is the body wall
of a mollusk. It resides below the shell where it covers the body of the
animal.
