input with options: Q: When is the rate of the forward reaction equal to the rate of the reverse reaction? A:
OPTIONS:
- at conduction
- before equilibrium
- after equilibrium
- at equilibrium
output: at equilibrium

input with options: Q: What is the natural selection that favors altruistic behavior by enhancing reproductive success of relatives known as? A:
OPTIONS:
- diversifying selection
- directional selection
- stabilizing selection
- kin selection
output: kin selection

input with options: Q: All species of crocodilians have similar body structures, including an elongated snout, powerful jaws, muscular tail, large protective scales, streamlined body, and eyes and nostrils that are positioned on what? A:
OPTIONS:
- below the neck
- back of head
- side of head
- top of head
output: top of head

input with options: Q: What do you call a compound that contains both an amino group and a carboxyl group in the same molecule? A:
OPTIONS:
- carbolic acid
- compound acid
- catalyst
- amino acid
output:
amino acid