Problem:OPTIONS:
- Daltons
- barrel
- atomic units
- energy
- kilograms
- grams
- forces
- Joules

Fact 1: Abalance is used for measuring mass of an object. Fact 2: Mass The base unit of mass is the gram. Given the two facts above, what is the base unit of measurement for a balance?
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A: grams

Problem:OPTIONS:
- melt
- explode
- run
- kill
- heat
- energy
- stay warm
- freeze

Fact 1: Coal is used for generating heat by burning. Fact 2: Gasoline is extremely flammable and can explode and burn if ignited. Given the two facts above, coal is used for generating heat and can what?
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A: explode

Problem:OPTIONS:
- Plants growth
- root growth
- to move people
- permineralization
- cell division
- Veins and arteries.
- movement
- Plant reproduction

Fact 1: Centrioles are organelles involved in cell division. Fact 2: Basal bodies function as centrioles. Given the two facts above, basal bodies function as organelles involved in what?
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A: cell division

Problem:OPTIONS:
- layers of fat
- bird species
- human species
- keystone species
- Organic compounds
- barnacles
- gastropod shells
- species of deer

Fact 1: Sponges are a source of food for many species of fish. Fact 2: Sponges are also keystone species. Given the two facts above, what are a source of food for many fish species?
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A:
keystone species