Fact 1: Afire requires oxygen to burn. Fact 2: In the vacuum of space, there's no oxygen to burn. Given the two facts above, where is fire impossible?
OPTIONS:
- evaporation
- In space
- A computer
- uncontrolled
- Inside a car
- On television
- summer end
- On a mountain

Answer: In space

Fact 1: Adult tunicates are barrel-shaped. Fact 2: Tunicates, or sea squirts, are marine organisms covered with a gelatinous tunic. Given the two facts above, what shape are sea squirts?
OPTIONS:
- rectangle
- Loose
- swimming
- barrel
- protected
- swea
- square
- cross

Answer: barrel

Fact 1: Adult echinoderms have radial symmetry. Fact 2: Starfish and sea urchins are also echinoderms. Given the two facts above, what adults have radial symmetry?
OPTIONS:
- sea urchins
- graptolites
- humans
- fur seals
- barnacles
- insects
- h2o
- gastropod shells

Answer:
sea urchins