A sailor notices that during every long voyage he and his crew suffers from bleeding gums and tooth loss. He is extremely concerned because once he
reaches home, he doesn't have those symptoms. Assume you are a
medical doctor and tell what vitamin is missing from the voyage diets.

1. loamy sand is about 80% sand with 10% clay and defined mostly by sand particles with some clay to provide structure and fertility. the sand particles are easily visible and the soil holds structure but breaks apart easily.

2. scott sand can improve his soil quality by incorporating more silt and organic matter into the soil. peat moss and organic matter can also be incorporated.

answer; both surfaces of the membrane are nonpermeable

ask your friends for what they got then copy it down if you don't have any friends which is fine than google it or pay the teacher