Aerobic exercise increases the size and strength of muscles in the heart and helps all your muscles develop greater endurance. Sasha exercises her muscles with weights daily, while Tanya does not exercise ever. Who likely has stronger muscles Sasha or Tanya?
Sasha

As blood glucose levels decrease, less insulin is produced. Bob's blood glucose levels have decreased, which means he should also be producing less or more insulin?
less

The higher up a food chain that humans eat, the greater the levels of toxic metals they take in. A human who eats an animal that is low on the food chain should take in more or less toxic metals?
less