Q: Fact 1: Adult echinoderms have radial symmetry. Fact 2: Modern echinoderms include starfish and sea urchins. Given the two facts above, what has radial symmetry? | OPTIONS:
- sea urchins
- A Greek letter
- humans
- Most plants
- peachleaf willow
- catfish
- gastropod shells
- ducks
A: sea urchins

Q: Fact 1: Flowers produce spores that develop into gametophytes. Fact 2: Tulips are heavy flowers. Given the two facts above, what produces spores that develop into gametophytes? | OPTIONS:
- plants
- ice
- tulips
- bushes
- orchids
- sunlight
- glaciers
- cacti
A: tulips

Q: Fact 1: Plant reproduction requires pollination. Fact 2: Many orchids are rewarding indoor plants. Given the two facts above, what requires pollination for reproduction? | OPTIONS:
- Roundworms
- Conifers
- orchids
- humans
- Newton
- h2o
- amoebae
- bees
A: orchids

Q: Fact 1: Sinkholes are formed by precipitation. Fact 2: Rain is also known as precipitation. Given the two facts above, what can cause sinkholes? | OPTIONS:
- Solid bedrock
- rivers
- mines
- Drought
- Rain
- Evaporation
- coal
- storms
A: Rain