Problem:OPTIONS:
- leaves
- peat
- paper
- solutes
- cells
- fungi
- trees
- sugar

Fact 1: Cells are the basic units of the structure and function of living things. Fact 2: Organic materials, or living things, are biodegradable. Given the two facts above, what are the basic units of the structure and are biodegradable?
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A: cells

Problem:OPTIONS:
- fatter or wider
- larger or smaller
- rapid expansion
- Chemical energy
- It expands
- longer or shorter
- more abundant
- thicker or thinner

Fact 1: Light enters the eye through an opening called the pupil. Fact 2: Light enters the eye through the pupil, and the pupil is made larger or smaller by the iris. Given the two facts above, light enters the pupil and makes it what?
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A: larger or smaller

Problem:OPTIONS:
- mud
- Nutrients
- sodium
- toxins
- motion
- sugar
- energy
- an anion

Fact 1: Organisms that live in marine biomes must be adapted to the salt in the water. Fact 2: Another name for salt is sodium. Given the two facts above, organisms in a marine biome must be be adapted to what in the water?
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A: sodium

Problem:OPTIONS:
- insects
- hummingbirds
- honeybees
- orchids
- seagulls
- disease
- h2o
- colors

Fact 1: Flowers attract pollinators, and fruits encourage animals to disperse the seeds. Fact 2: Hummingbirds are the most common bird pollinators. Given the two facts above, what do flowers tend to attract?
****
A:
hummingbirds