Q: What substances affect the brain and influence how a person feels, thinks, or acts? A:
OPTIONS:
- H2 blockers
- primeval drugs or drugs
- amphetamines
- psychoactive drugs or drugs
psychoactive drugs or drugs

Q: In multicellular organisms, specialized cells may be organized into what, which in turn may be organized into organs? A:
OPTIONS:
- nutrients
- muscles
- blood cells
- tissues

Answer: tissues

Question: Q: What do opposite charges do to one another? A:
OPTIONS:
- strengthen
- weaken
- repel
- attract
Answer: attract

input with options: Q: What is it called when currents keep reversing direction? A:
OPTIONS:
- circle current
- emitting current
- stream current
- alternating current
output: alternating current

Q: Q: What state of matter completes the list: solid, liquid, gas? A:

OPTIONS:
- energy
- ice
- power
- plasma

A: plasma

Q: What kind of charge do electrons have? A:
OPTIONS:
- effective
- unusual
- positive
- negative
negative