Fact 1: Active immunity results when an immune response to a pathogen produces memory cells. Fact 2: Memory cells persist in the circulation for decades. Given the two facts above, what can persist in the circulation for decades?
OPTIONS:
- active immunity
- density
- Veins and arteries.
- oxygen cells
- bacteria
- chlorofluorocarbons
- fur and fat
- Chemical energy

Answer: active immunity

Question: Fact 1: Many consumers feed at more than one trophic level. Fact 2: Each step along a food chain is known as a trophic level. Given the two facts above, many consumers feed at more than one what along a food chain?
OPTIONS:
- humans
- cacti
- goats
- step
- scale
- Length
- a path
- Energy
Answer: step

input with options: Fact 1: Folding an object causes that object to change shape. Fact 2: Origami figures are paper folding art projects. Given the two facts above, what is a method for changing an object's shape?
OPTIONS:
- a prism
- stasis
- programmed
- inertia
- A computer
- mechanical
- origami
- stabilization
output: origami

Q: Fact 1: Mutations are essential for evolution to occur. Fact 2: Mutations are changes in the DNA sequence. Given the two facts above, what is essential for evolution to occur?

OPTIONS:
- Changes in DNA sequences
- Plant reproduction
- Natural disasters
- Gamma radiation
- biological diversity
- DNA sequences staying the same
- the environment
- that material's properties

A: Changes in DNA sequences

input: OPTIONS:
- Energy.
- two
- waves
- fires
- the Sun
- sunlight
- rivers
- erosion Now, answer this question: Fact 1: The gravitational pull of the Moon on Earth 's oceans causes the tides. Fact 2: High tide is when the best waves come in. Given the two facts above, what does the gravitational pull of the Moon on Earth 's oceans cause?
A:
output: waves

Question: Fact 1: Muscle contraction occurs when muscle fibers get shorter. Fact 2: Movement is based on the contraction of muscles. Given the two facts above, what do muscle fibers need to do to enable movement?
OPTIONS:
- Bend
- strength
- exercise
- ligt
- It expands
- shorten
- Vibrates
- stay warm
Answer:
shorten