2. Explain why the narrator states that "pesticides were not always thought to

be harmful".

3. How does the chemical solution DDT work?.

4. Explain the relationship between Polio, Typhus, WWII and DDT.

Which sentence is an example of a strong conclusion to an autobiography? a. i stayed after school three days in a row to practice onstage in the auditorium. b. i knew i would have to practice all week to memorize my dance for the recital. c. after the recital was over, i knew practicing was worth it, and i was looking forward to my next big challenge. d. on opening night, i danced in front of a packed auditorium.

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots

Which is not a characteristic of bacteria? a. they are unicellular. b. they are prokaryotic. c. they are the smallest form of life on earth. d. they are multicellular.