Fact 1: Flatworms belong to the phylum Platyhelminthes. Fact 2: Parasitic flatworms have evolved a close association with their hosts. Given the two facts above, organisms belonging to the phylum Platyhelminthes have evolved a close association with their what?

OPTIONS:
- ovaries
- Wasps
- life
- plant
- orchids
- hosts
- root system
- tree host

Answer: hosts

Fact 1: Wiring requires an electrical conductor. Fact 2: Metals, such as copper wire, are good conductors for carrying electric current. Given the two facts above, what can be used in wiring as a conductor?

OPTIONS:
- paper
- energy
- tube
- copper
- a prism
- photons
- leather
- light

Answer: copper

Fact 1: When a cooler object touches a warmer object , thermal conduction occurs. Fact 2: Thermal conduction removes heat from the center. Given the two facts above, what happens when a cooler object touches a warmer object?

OPTIONS:
- Temperature changing
- they die
- thermometer
- flow of electrons
- heat removed from the center
- matter vibrating
- h2o loss
- converting electricity to heat

Answer: heat removed from the center

Fact 1: Immunity results from immunization. Fact 2: Oxygen deprivation in immune cells causes immune weaknesses. Given the two facts above, oxygen deprivation in cells result in what?

OPTIONS:
- weakness
- strength
- Dehydration
- anemia
- oxygen
- water
- Damages them
- Pollution

Answer:
weakness