The marine biologists studied two areas of the Black Sea. Area A, situated at the mouth of the Danube River, which presented high levels of water stratification, because of the fresh water discharged by the river; and area B, situated 35 miles south, where the water was less stratified and more oxygenated. Which of the two areas had less dense water?
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Answer: Area A

Two sisters named Mary and Ann went in for a blood test and found out that Mary had sickle cell anemia. Ann was normal. Which sister had a disease that causes the red blood cells to have a sickle shape?
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Answer: Mary

Benny and Jerry were two Irish twins. They went to the doctor for their yearly exam. Benny found out he could get cancer because of his lifestyle so he decided to make healthy lifestyle choices from then on. Jerry continued smoking, spending lots of time in the sun, and eating junk-food. Which brother lowered the risk of getting lung cancer by quitting smoking?
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Answer:
Benny