Problem: Michael and his grandfather used to play basketball all the time when Michael was younger. Michael is now much older and his grandfather just cant seem to keep up with him at all anymore. Eventually Michael's Grandfather who is now in his 60's decides to stop playing basketball altogether. Will Michael's Grandfather's strength and stamina likely increase or decrease?

A: decrease

Problem: Two groups of students made some experiments for school. Group A used brewer's yeast on flower and tried to make bread. and Group B brewed beer with brewer's yeast, then baked bread with baker's yeast. Which group used the wrong yeast for bread?

A: Group A

Problem: Czar Nicholas was the last Romanov who ruled Russia. Al along he was in good health, but that was not the case with his son Prince Alexei. While Nicholas was free from hemophilia, a disease that devastated European royal families, Alexei was born with hemophilia. Many suggest this situation made some opportunists to take advantage of the Czar. Who would have less risk of bleeding to death, Nicholas or Alexei?

A: Nicholas

Problem: Paul and Dirk were studying the human digestive system. paul studied more about the stomach, while Dirk studied more about the jejunum. Which student read less about villi?

A:
Paul