Fact 1: Mammals generate heat mainly by keeping their metabolic rate high. Fact 2: Humans use food to generate body heat. Given the two facts above, what keeps mammals' metabolic rates high?
OPTIONS:
- gas
- muscle
- fur
- sleep
- water
- Fe
- food
- ice
food

Fact 1: Evolution occurs in response to a change in the environment. Fact 2: Climate change is likely to have a significant impact on the global environment and human society. Given the two facts above, a significant evolutionary response might be the result of what?
OPTIONS:
- Plant reproduction
- Greenhouse gasses
- climate change
- rapid expansion
- Plants growth
- competition
- Chemical energy
- Electrical energy

Answer: climate change

Question: Fact 1: All chemical reactions require activation energy to get started. Fact 2: Activation energy is required to overcome the energy barrier. Given the two facts above, overcoming the energy barrier starts a what?
OPTIONS:
- chemical reaction
- contraction
- Movement of an air mass
- expansion
- metabolic reaction
- energy storage
- increased body strength
- oxidation reaction
Answer: chemical reaction

input with options: Fact 1: Organisms cluster around hydrothermal vents in the ocean floor. Fact 2: Chimneys top some hydrothermal vents. Given the two facts above, what do organisms cluster around in the ocean floor?
OPTIONS:
- kalenchoes
- ferns
- bacteria
- Chimneys
- an object
- alveoli
- graptolites
- allow growth
output: Chimneys

Q: Fact 1: Cycles of freezing and thawing water cause ice wedging. Fact 2: An ordinary ice road is therefore severely damaged by cracks induced by the traffic. Given the two facts above, cycles of freezing and thawing water can cause what?

OPTIONS:
- clean county roads
- exposure to cold
- severely damaged roads
- Physical weathering
- colder weather
- Metling snow
- smooth safe roads
- rough riding

A: severely damaged roads

Fact 1: Cancer genes can be inherited. Fact 2: Children inherit from their parents. Given the two facts above, parents can pass on many genes, including those for:?
OPTIONS:
- the eyes
- trust accounts
- animals
- babies
- cremation
- clothing
- cancer
- offspring
cancer