Why do humans need more potent pesticides over time?
A) because the target population soon develops a resistance to the chemical
B) because pesticide salesman need to make more money
C) because plants begin to eat the pesticides
D) because the explosive growth of the human population places increased demands on current farmers

Protein and polypeptide sequences can be determined by first partially hydrolyzing the protein or polypeptide followed by amino acid sequencing of the fragment pieces using the chemical degradation process known as edman degradation. determine the sequence of the initial (18-amino acid) polypeptide that produces the following five partial sequences after hydrolysis and edman degradation.