Fact 1: Having no natural predators increases population size. Fact 2: Populations can also be limited by predation. Given the two facts above, what does predation limit on a species?
OPTIONS:
- Animal survival
- Reproduction
- the number of animals
- genetic material
- scarce resources
- nutrients
- grass
- birds
the number of animals

Fact 1: Viruses cause many human diseases. Fact 2: Some smallpox viruses are maintained in laboratories. Given the two facts above, what can smallpox cause?
OPTIONS:
- contamination
- harmful substances
- vaccines
- photosynthesis
- extinction
- cellular respiration
- Destroy crops
- human disease

Answer: human disease

Question: Fact 1: An animal usually requires a warm body temperature for survival. Fact 2: Warm blooded animals have a constant body temperature. Given the two facts above, animals usually require what for survival?
OPTIONS:
- organic molecules
- organic material
- Fluctuating body temperature.
- Ears
- food and shelter
- Cold blood
- Organic compounds
- Constant body temperature.
Answer: Constant body temperature.

input with options: Fact 1: Shelter is used for protection by animals against weather. Fact 2: Many animals use sponges for shelter. Given the two facts above, what can animals use for protection?
OPTIONS:
- hair
- bushes
- keratin
- food
- shells
- appendages
- energy
- sponges
output: sponges

Q: Fact 1: Vertebrates are animals that have a backbone. Fact 2: Jaws appear within the vertebrates. Given the two facts above, what appear within animals that have a backbone?

OPTIONS:
- animals without backbones
- nerves
- californium
- otters
- muscle
- jaws
- Birds
- fingernails

A: jaws

Fact 1: Bacteria in soil convert atmospheric nitrogen into a form usable by plants. Fact 2: Nitrogen deficiency increases the stress on the plants. Given the two facts above, what does bacteria in the soil help to prevent?
OPTIONS:
- contamination
- colder weather
- Pollution
- anemia
- plant stress
- Greenhouse gasses
- toxins
- disease
plant stress