Problem:OPTIONS:
- cells
- gills
- HIV
- skin
- immune
- rabies
- lungs
- Herpes

Fact 1: Skin is used for protecting the body from harmful substances. Fact 2: Natural toxins can be harmful too. Given the two facts above, what organ in the body can protect you from toxins?
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A: skin

Problem:OPTIONS:
- influenza
- Pesticides
- cooperation
- heat energy
- competition
- tradition
- boredom
- hormones

Fact 1: Competition may cause animals to fight towards members of their own species. Fact 2: Lions are members of the 'Panthera leo' species. Given the two facts above, what may cause lions to fight other lions?
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A: competition

Problem:OPTIONS:
- migrate
- sweating
- strength
- cartilage
- illness
- anemia
- allow growth
- Leptospirosis

Fact 1: Cartilage is a tough tissue that contains a protein called collagen. Fact 2: Cartilage cells, called chondroblasts, make cartilage. Given the two facts above, chondroblasts lead to to what?
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A: cartilage

Problem:OPTIONS:
- structure and function
- Seeds are healthy to eat
- it keeps an organism warm
- The seed gets dropped in water
- The plant grows somewhere else
- members of their own species
- lowered energy cost
- It kills the seed

Fact 1: Seed dispersal has a positive impact on a plant. Fact 2: Result is animals carry seeds elsewhere, dispersing the plant. Given the two facts above, why is it good for animals to carry seeds?
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A:
The plant grows somewhere else