Q: Fact 1: Testosterone stimulates the reproductive organs to develop into male organs. Fact 2: For men, however, the hormone in question is testosterone. Given the two facts above, what stimulates the reproductive organs to develop into male organs? | OPTIONS:
- a hormone
- bioaerosols
- Energy.
- Energy
- Leptospirosis
- a doorbell
- seeds
- Chlorophyll
A: a hormone

Q: Fact 1: Being burried under soil and mud changes peat into coal through extreme heat and pressure in a swamp over a long period of time. Fact 2: Peat moss is the organic matter that mixes with soil to form peat. Given the two facts above, what being buried under mud changes peat into coal? | OPTIONS:
- a hydraulic system
- space matter
- mud shoes
- Water expanding
- Physical weathering
- organic matter
- flow of electrons
- insignificant matter
A: organic matter

Q: Fact 1: Air pollution can cause the pH of soil to decrease. Fact 2: Research has shown that soil pH less than 6.0 can decrease crop yields. Given the two facts above, air pollution can cause a decrease in what? | OPTIONS:
- The atmosphere
- kinetic energy
- smoke
- crop yields
- nutrients
- Temperature
- fires
- smog
A: crop yields

Q: Fact 1: Vertebrates are animals that have a backbone. Fact 2: Vertebrates generally have a backbone called the spinal column. Given the two facts above, if an animal has a spinal column in their skeletal system what is it called? | OPTIONS:
- skeletal animal
- vertebrate
- A Greek letter
- invertebrated
- organ
- critical organs
- spined animal
- epidermal
A: vertebrate