Question: Barb and Ann were friends. The used to play together outside in the yard till one day Barb's parents found out that she had sickle cell anemia. They haven't played together since. Which girl didn't present a genetic abnormality?
Answer: Ann

Question: Bob was studying about Earth's atmosphere. He found that increased depletion of Earth's ozone layer is a relatively new phenomenon. Most scientists would blame the CFC gases for the depletion of ozone layer. In the early twentieth century ozone layer was relatively stable. Bob labeled that time as time A. But in the late twentieth century situation changed with seasonal depletion of ozone layer. He labeled that time as time B. Would time B see less or more phytoplankton than time A?
Answer: less

Question: Tim and Robert are both farmers who eat the majority of their diet from the foods they produce themselves. Tim has been spraying his crops for the last several years with high amounts of DDT as he enjoys how much it keeps the insects away. Robert instead avoids all DDT use and hires workers to hand check every single crop to remove insects and other pests. Who is at a lower risk for developing cancer from their crops?
Answer:
Robert