Humans need food to grow and survive. Food that is not used immediately by the body for energy is OPTIONS:
- stored for future use
- converted to water for energy
- used to remove wastes from cells
- transformed into oxygen for survival
A: stored for future use

Genetically modified plants with new characteristics have been produced through genetic engineering methods. What impacts have resulted from the use of genetically modified plants? OPTIONS:
- decreases in farm production
- decreases in corn, soybean, cottonseed, and canola oils
- increases in time required to plant, grow, and harvest crops
- increases in resistance to herbicides, insects, and viral diseases
A: increases in resistance to herbicides, insects, and viral diseases

Some materials are electrical conductors. Which material best conducts electricity? OPTIONS:
- copper
- plastic
- rubber
- wood
A: copper

Which behavior can help animals establish a territory? OPTIONS:
- A caribou herd migrates seasonally.
- A scent trail leads ants to a food source.
- A wolf pack howls to warn other wolves to stay away.
- A honeybee society divides the work between its members.
A:
A wolf pack howls to warn other wolves to stay away.