Problem:OPTIONS:
- allow growth
- resistance
- Sediment
- meristems
- layers of fat
- Energy
- storing water
- alveoli

Fact 1: Roots have primary and secondary meristems for growth in length and width.  Fact 2: Secondary meristems develop after primary meristems.  Given the two facts above, what do roots have?
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A: meristems


Problem:OPTIONS:
- circulatory systems
- genetic material
- hurricanes
- tsunamis
- genetic diversity
- decomposition
- torrential rain
- organic molecules

Fact 1: Decomposition increases the amount of nutrients in the soil.  Fact 2: Soil provides nutrients and moisture necessary for plant growth and is fundamental to all life.  Given the two facts above, what increases the amount of plant growth and is fundamental to all life?
****
A: decomposition


Problem:OPTIONS:
- evolution
- population growth
- forest is destroyed
- species variation
- major threat to health
- Dehydration
- the ground shaking
- a bottleneck effect

Fact 1: Bottleneck effect occurs when a population suddenly gets much smaller.  Fact 2: Severe droughts have caused much of the rural population to urbanize.  Given the two facts above, severe droughts may cause ?
****
A: a bottleneck effect


Problem:OPTIONS:
- volcanoes
- flooding
- desert
- Condensation
- Sinkholes
- Dehydration
- erosion
- cloud formation

Fact 1: Sinkholes are formed by precipitation.  Fact 2: Rain is also known as precipitation.  Given the two facts above, what can rain cause?
****
A:
Sinkholes