Fact 1: Grasses supply most of the food consumed by people worldwide. Fact 2: Grasses are an important source of food for people as well as animals. Given the two facts above, what relies on grass as a food source?
OPTIONS:
- Bacteria
- Soil
- humans
- More grass
- perennials
- alpacas
- Animals
- tortoises

Answer: Animals

Fact 1: Echinoderms use pheromones to communicate with each other. Fact 2: Starfish and sea urchins are also echinoderms. Given the two facts above, what uses pheromones to communicate with each other?
OPTIONS:
- starfish
- bees
- bacteria
- honeybees
- density
- humans
- h2o
- insects

Answer: starfish

Fact 1: Mutations that lead to cancer usually occur in genes that control the cell cycle. Fact 2: Radiation causes mutation. Given the two facts above, what can affect genes that control the cell cycle?
OPTIONS:
- Leptospirosis
- acetic acid
- water vapor
- Smoking
- butter
- radiation
- resistance
- gasoline

Answer:
radiation