For a free-living, terrestrial nematodes, what would be the selective advantage of a cuticle?

Could someone me with number one you

Why is it important that fibrin is insoluble in water?

Plz ! having a smooth seeds is the dominant trait. having wrinkled seeds is a recessive trait. the offspring of two plants with smooth seeds, a. must have smooth seeds. b. may have smooth or wrinkled seeds. c. must have wrinkled seeds. d. have a 25% change of having smooth seeds.