Q: Q: What do you call the energy that must be overcome in order for a chemical reaction to occur, or the minimum energy required to start a chemical reaction? A: | OPTIONS:
- expression energy
- phase energy
- kinetic energy
- activation energy
A: activation energy

Q: Q: The attractive force between water molecules is what kind of reaction? A: | OPTIONS:
- symmetrical reaction
- aquatic reaction
- diffusion reaction
- dipole reaction
A: dipole reaction

Q: Q: What happens to the recessive traits in the offspring of a hybridization? A: | OPTIONS:
- they dominate
- remain recessive
- they replicate
- they disappear
A: they disappear

Q: Q: What organ system consists of the skin, nails and hair? A: | OPTIONS:
- nervous system
- digestive system
- endocrine system
- integumentary system
A: integumentary system