Certain birds, such as the flaming or the kori bustard bird, are able to fly because of a certain internal adaptation to their bones. These criss-cross structures allow the bird to be lightweight but still retain bone strength. Which adaptation makes it easier for birds to fly?

A. gills

B. struts

C. cartilage

D. bone marrow

A0.10 m aqueous solution of sodium sulfate is a better conductor of electricity than a 0.10 m aqueous solution of sodium chloride. which of the following best explains this observation? (a) sodium sulfate is more soluble in water than sodium chloride. (b) sodium sulfate has a higher molar mass than sodium chloride. (c) to prepare a given volume of 0.10 m solution, the mass of sodium sulfate needed is more than twice the mass of sodium chloride needed. (d) more moles of ions are present in a given volume of 0.10 m sodium sulfate than in the same volume of 0.10 m sodium chloride. (e) the degree of dissociation of sodium sulfate in solution is significantly greater than that of sodium chloride.