1. Glucose moves into many cells through facilitated diffusion. This works because there is usually a higher concentration of glucose molecules outside the cell than inside the cell. Why is this the...

1. Glucose moves into many cells through facilitated diffusion. This works because there is usually a higher concentration of glucose molecules outside the cell than inside the cell. Why is this the case? (Hint: Do cells use up the glucose inside them?)

2. In plants, roots absorb water (among other functions). Why are the roots of many plants highly branched?