Fact 1: Nephrons are the structural and functional units of the kidneys. Fact 2: Blood is filtered in the kidney. Given the two facts above, what filters blood?

OPTIONS:
- nephrons
- capillaries
- mechanical
- four limbs
- animals
- organ
- sunlight
- mollusks

Answer: nephrons

Problem: OPTIONS:
- kinetic energy
- amphibians
- all animals
- watching tv
- oxygen
- most organisms
- Time and energy
- cell regeneration
Q: Fact 1: Healing requires rest. Fact 2: Healing and cell regeneration follows. Given the two facts above, what requires rest?
Answer: cell regeneration

Problem:OPTIONS:
- resistance
- spread flower seeds
- rapid expansion
- alleles move in
- Leptospirosis
- survival
- competition
- permineralization

Fact 1: Gene flow occurs when individuals move into or out of a population. Fact 2: Gene flow is the movement of alleles in or out of a population. Given the two facts above, what occurs when individuals move into a population?
****
A: alleles move in

Fact 1: Mammals generate heat mainly by keeping their metabolic rate high. Fact 2: Excess body weight raises metabolic heat production. Given the two facts above, what raises metabolism?
OPTIONS:
- cigarettes
- Chlorophyll
- Chemical energy
- aerobic capacity
- fossil fuels
- Fully cooking the oysters
- smoking cigarettes
- excess body weight
excess body weight

Fact 1: Earth 's tilt on its rotating axis causes seasons to change. Fact 2: Habitats change with the seasons. Given the two facts above, what causes habitats to change?
OPTIONS:
- global warming
- the environment
- fire conditions
- Earth's tilt on its axis
- To another location like underground
- looseness of dirt or compost
- deforestation
- a tree falling

Answer: Earth's tilt on its axis

input with options: Fact 1: Friction causes an object to lose energy. Fact 2: Friction occurs when two substances rub together. Given the two facts above, what causes an object to lose energy?
OPTIONS:
- wind and erosion
- pressure differences.
- refract or absorb.
- heat is produced
- electron transport
- depress neuronal excitability
- degrees Celsius
- 2 substances rubbing together
output:
2 substances rubbing together