Problem: Brad and Joe studied atmospheric conditions on different planets of our solar system. Joe studied about Earth, while Brad studied more about Venus. Which person learned about the planet with a thicker atmosphere?

A: Brad

Problem: 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 wasn't homozygous dominant?

A: Mary

Problem: Moon and Earth were two sister planets, both inhabited by humans. People of Earth released large quantities of greenhouse gases into the atmosphere over the last decades, while Moon people were taking good care of their planet and the environment. Which planet observed an increased average global temperature?

A: Earth

Problem: China used alternative fuels to generate electricity, while Mongolia burned lots of fossil fuels. There were frequent debates between the two countries on this matter. Which country released more carbon dioxide into the atmosphere?

A:
Mongolia