If a cell is placed in a hypotonic solution, which will occur?
a. salts will move into the cell from the surrounding solution.
b. water will move into the cell from the surrounding solution.
c. salts will move out of the cell into the surrounding solution.
d. water will move out of the cell into the surrounding solution.
e. none of the choices will occur.

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products

the answer would be   10%