Fact 1: Viruses are so small that they can be seen only with an electron microscope. Fact 2: Some smallpox viruses are maintained in laboratories. Given the two facts above, what is so small it can be seen only with an electron microscope?

OPTIONS:
- all invertebrates
- humans
- bacteria
- alveoli
- acetic acid
- orchids
- smallpox
- planets

Answer: smallpox

Fact 1: Insects may live in large colonies and have complex social behaviors. Fact 2: Ants are social insects living in colonies. Given the two facts above, what type of behavior does an ant have?

OPTIONS:
- Randomized
- Social
- Solitary
- dangerous
- complex
- Problematic
- movement
- kinetic

Answer: Social

Fact 1: Some flowers become fruits. Fact 2: Fruits are an adaptation for seed dispersal. Given the two facts above, some flowers become an adaptation for what?

OPTIONS:
- genetic diversity
- Reproduction
- insects
- seed dispersal
- Plant reproduction
- seed cracking
- seed destruction
- seed withering

Answer: seed dispersal

Fact 1: Hydrogen bonds cause water to expand when it freezes. Fact 2: Ice is frozen water. Given the two facts above, what causes ice to expand as it is formed?

OPTIONS:
- precipitation
- water
- Physical weathering
- sunlight
- music
- Condensation
- heat produced
- hydrogen bonds

Answer:
hydrogen bonds