Fact 1: Flowers produce spores that develop into gametophytes. Fact 2: Because ferns lack flowers and seeds, they reproduce through spores. Given the two facts above, what do ferns reproduce with?
OPTIONS:
- pollen
- heat
- a cuticle
- sunlight
- alleles
- spores
- chemicals
- bushes

Answer: spores

Fact 1: Male dogs use pheromones in urine to mark their territory. Fact 2: Pheromones are hormones that are thought to stimulate, through smell, sexual reactions in animals. Given the two facts above, what do male dogs use to mark their territory?
OPTIONS:
- smell
- H 2 O
- love
- intuition
- gourdin
- tongue
- sight
- fur

Answer: smell

Fact 1: Friction causes an object to lose energy. Fact 2: Friction causes the decline of speed. Given the two facts above, the decline of speed is associated with what?
OPTIONS:
- an object gaining energy
- a lot of human deaths
- decrease stamina
- hyperthyroidism
- an object losing energy
- an object gaining momentum
- body temperature reduces
- an object going faster

Answer:
an object losing energy