Problem:OPTIONS:
- superior
- gamma
- beta
- dominant

Q: The most powerful or influential individual in a group is sometimes called what? A:
****
A: dominant

Q: Electrical messages are carried by chemicals called what? A:
OPTIONS:
- receptors
- amino acids
- Biotoxins
- neurotransmitters
neurotransmitters

Q: Represented in equations by the letter "g", what pulls objects down to the earth's surface? A:
OPTIONS:
- energy
- motion
- light
- gravity

Answer: gravity

Question: Q: What is formed when an element gains one or more electrons? A:
OPTIONS:
- cation
- ion
- neutron
- anion
Answer: anion

input with options: Q: What is it called when organisms with traits that better enable them to adapt to their environment tend to survive and reproduce in greater numbers? A:
OPTIONS:
- natural distribution
- adaptation
- evolution
- natural selection
output: natural selection

Problem: OPTIONS:
- gas and steam
- spark and steam
- diesel and internal combustion
- external and internal combustion engines
Q: Q: What are the two basic types of combustion engines? A:
Answer:
external and internal combustion engines