Q: Fact 1: Some arthropods have special excretory structures. Fact 2: All insects are arthropods. Given the two facts above, what sometimes has special excretory structures? | OPTIONS:
- insects
- bees
- a fish
- barnacles
- animals
- carbon
- feces
- humans
A: insects

Q: Fact 1: Cooking food requires adding heat energy. Fact 2: Electrical energy ultimately becomes heat energy. Given the two facts above, what type of energy can be used to cook food? | OPTIONS:
- Light
- metabolism
- sluggish
- fossil fuels
- magnetic
- electrical
- Evaporation
- sunlight
A: electrical

Q: Fact 1: If a neutral atom loses an electron then an atom with a negative charge will be formed. Fact 2: Ions are atoms or groups of atoms that carry a positive or negative electrical charge. Given the two facts above, a neutral atom that loses an electron becomes what? | OPTIONS:
- a solute
- nucleus
- an object
- iron
- sugar
- dormant
- inactive
- an ion
A: an ion

Q: Fact 1: Sex hormones are chemical messengers that control sexual development and reproduction. Fact 2: Sex hormones control sexual development in male and female bodies. Given the two facts above, sex hormones are what in male and female bodies? | OPTIONS:
- Something that is self-aware
- more abundant
- allow growth
- production
- consumers
- lymph nodes
- competing for resources
- chemical messengers
A: chemical messengers