Wind erosion

a. removes the fertile b horizon of soil

b. can be reduced by cutting down trees

c. happens slowly in dry climates

d. is both destructive and constructive

You are studying a protein that you call protein x. there is an aspartic acid at a key position in protein x which is important in the folding and stabilization of that protein. if this aspartic acid is changed to a different amino acid, which type of amino acid substitutions is most likely to allow the protein to fold normally?