The more carbon atoms a hydrocarbon has, the greater the number of isomers.  When we look at a molecule we can determine that if it it has few atoms it will typically have many or few isomers?
few

On a hot day, an endotherm may give off more heat by increasing blood flow to the surface of the body.  Eric went outside in the winter. He is more or less likely to give off heat than if it was summer?
less

More UV rays increase skin cancer rates.  John was studying skin disease in his research lab. He observed that the less UV rays that contact the skin resulted in skin cancer rates becoming Larger or Smaller?
Smaller

The more cylinders a car engine has, the more powerful its engine can be.  A car with 8 cylinders is less powerful or more powerful than a car with 6 cylinders?
more powerful