*Question*
Fact 1: Plants use unsaturated fatty acids to store energy. Fact 2: Among the unsaturated fatty acids are compounds with one, two or three double bonds. Given the two facts above, answer the question "Plants use what type of compounds to store energy?" with the following options: - thermal insulators - It helps them survive - during the day - spring, summer, autumn, winter - compounds with double bonds - hydrogen and oxygen - Something with exactly eight protons - it helps plants in growing
**Answer**
compounds with double bonds

*Question*
Fact 1: Gases from burning coal and oil dissolving in water in the atmosphere causes acid rain. Fact 2: Acid rain can harm plant life and actually kill plants. Given the two facts above, answer the question "gases from burning coal and oil dissolving in water can harm what?" with the following options: - soils - people - oil reserves - plant life - animals - coal factories - humans - gas buildup
**Answer**
plant life

*Question*
Fact 1: Aggression is behavior that is intended to cause harm or pain. Fact 2: Pain in the present is experienced as hurt. Given the two facts above, answer the question "Aggression is behavior that is intended to what?" with the following options: - hurt nothing - kill them - humans - Destroy crops - cause hurt - cause disinterest - people - cause help
**Answer**
cause hurt

*Question*
Fact 1: Some arthropods have special excretory structures. Fact 2: Insects are the largest group of arthropods. Given the two facts above, answer the question "What can have special excretory systems?" with the following options: - feces - barnacles - animals - cacti - fungi - wings - soil - insects
**Answer**
insects