Fact 1: Mutations that lead to cancer usually occur in genes that control the cell cycle. Fact 2: Many carcinogens are capable of causing gene mutations. Given the two facts above, what can lead to cancer in genes that control the cell cycle?

OPTIONS:
- radiation
- adding heat
- competition
- ice
- bacteria
- air
- carcinogens
- Smoking

Answer: carcinogens

Fact 1: Glass cause refraction of light. Fact 2: Prisms are round pieces of glass. Given the two facts above, what do prisms do to light?

OPTIONS:
- focusing a lens
- Refract it
- Reflect it
- protect them
- Absorb it
- observe it
- It expands
- Diffraction

Answer: Refract it

Fact 1: Some birds are pollinators that co-evolved with plants. Fact 2: Hummingbirds are an important groups of bird pollinators. Given the two facts above, what co-evolved with plants?

OPTIONS:
- gravity
- peachleaf willow
- Chemical energy
- Organic compounds
- hummingbirds
- h2o
- density
- animals

Answer: hummingbirds

Fact 1: Urine leaves the body through a sphincter in the process of urination. Fact 2: From the bladder, urine leaves the body. Given the two facts above, urine has to pass through what as the bladder empties?

OPTIONS:
- epidermal
- body water
- a sphincter
- all liquids
- mouth of rivers
- alveoli
- salt and water.
- aqueous solution

Answer:
a sphincter