Q: Fact 1: Arefrigerator is used for keeping food fresh for a long period of time. Fact 2: Refrigerators are major users of electricity. Given the two facts above, keeping food fresh is a major user of what? | OPTIONS:
- kinetic energy
- coal
- eating dinner
- hydration
- heat energy
- growing vegetables
- electricity
- Energy
A: electricity

Q: Fact 1: Echinoderms lack respiratory and excretory systems. Fact 2: Lung mechanics and gas exchange are topics during study of the respiratory system. Given the two facts above, what do Echinoderms lack? | OPTIONS:
- Lungs
- Mass
- oxygen
- eardrum
- gills
- ovaries
- Organs
- Bodies
A: Lungs

Q: Fact 1: All plants have a characteristic life cycle that includes alternation of generations. Fact 2: Alternation of generation is typical of ferns and Bryophyta. Given the two facts above, what are plants? | OPTIONS:
- Trees
- dirt
- plants
- ferns
- rocks
- food
- edible
- bacteria
A: ferns

Q: Fact 1: Organisms use lipids to store energy. Fact 2: Another name for fat is lipid . Given the two facts above, organisms use what to store energy? | OPTIONS:
- food
- skin
- fat
- RNA
- batteries
- CO 2
- bone
- O2
A: fat