Problem:OPTIONS:
- wind
- magma
- bacteria
- influenza
- mortality
- a pathogens
- reproduction
- parasites

Fact 1: Harming an animal species causes that animal 's population to decrease. Fact 2: If mortality is greater, then the population decreases. Given the two facts above, what can cause a population decline?
****
A: mortality

Problem:OPTIONS:
- vases
- Fungi
- models
- Trees
- Conifers
- plants
- seeds
- greenhouses

Fact 1: All plants have a characteristic life cycle that includes alternation of generations. Fact 2: Plants have chlorophyll and an alternation of generations . Given the two facts above, what have chlorophyll and a characteristic life cycle?
****
A: plants

Problem:OPTIONS:
- fats
- plants
- sodium
- blood
- Energy
- sugar
- food
- carcass

Fact 1: Animals use saturated fatty acids to store energy. Fact 2: Fatty Acids Fatty acids are the building blocks of fats. Given the two facts above, which of the following would animals use to store energy?
****
A: fats

Problem:OPTIONS:
- matter
- flowers
- Energy.
- air
- energy
- shade
- lenses
- light

Fact 1: If an object reflects light toward the eye then that object can be seen. Fact 2: Without light there is nothing to connect the eye to the object. Given the two facts above, without what, no object can be seen?
****
A:
light