Fact 1: Many corals secrete an exoskeleton that builds up to become a coral reef. Fact 2: Good examples are Bubble coral, Elegance coral, Frogspawn and other Euphyllia corals. Given the two facts above, what is secreted by organisms like frogspawn to become a reef?

OPTIONS:
- exocrine glands
- food and shelter
- exoskeleton
- bones
- Energy
- Chemical energy
- plasma
- Energy.

Answer: exoskeleton

Fact 1: Plants respond to daily and seasonal cycles and to disease. Fact 2: Temperature follows a seasonal cycle. Given the two facts above, what do plants respond to?

OPTIONS:
- Energy.
- heat produced
- Chemical energy
- sun's heat
- the environment
- heat energy
- Sulfur dioxide
- temperature

Answer: temperature

Fact 1: Sweating reduces body heat. Fact 2: Shivering produces heat in the body. Given the two facts above, what will make human temperatures go in a different direction from what sweating would do?

OPTIONS:
- humidity
- shivering
- improve
- energy usage
- a blazing fire
- hot air
- harm them
- Damages them

Answer: shivering

Fact 1: Gills are used for breathing water by aquatic animals. Fact 2: All aquatic animals require dissolved oxygen to breathe. Given the two facts above, what do aquatic animals need to survive?

OPTIONS:
- Water
- gills
- food
- air
- fishing
- desert
- history
- warmth

Answer:
gills