In maintaining the large land empire of russia, what was arguably the main difficulty?

a. ethnic divisions
b. inexperienced leaders
c. lack of industrialization
d. lack of natural resources

Cells a and b are the same size and shape, but cell a is metabolically quiet and cell b is actively consuming oxygen. oxygen will diffuse more quickly into cell because . b the oxygen molecules inside cell b have a higher kinetic energy b. a its membrane transport proteins will not be saturated c. a the diffusion gradient there is shallowerd. b the diffusion gradient there is steeper