Problem: OPTIONS:
- one month
- four months
- three months
- two months
Q: Q: The fetal stage begins about how long after fertilization? A:
Answer: two months

Problem:OPTIONS:
- the mesosphere
- the crust
- the core
- the mantle

Q: Earthquakes mark the motions of colliding plates and the locations where plates plunge into what? A:
****
A: the mantle

Q: What descend from clouds in funnel-like shapes that spin violently, producing powerful winds? A:
OPTIONS:
- currents
- rains
- hurricanes
- tornadoes
tornadoes

Q: What has two chains of nucleotides, one more than rna? A:
OPTIONS:
- gna
- fna
- mna
- dna

Answer: dna

Question: Q: The difference in electric potential energy which allows for an electric charge to move from one position to another is measured by what si unit? A:
OPTIONS:
- ohm
- joule
- meter
- volt
Answer: volt

input: OPTIONS:
- metabolism impulses
- energy
- neurotransmitters
- nerve impulses Now, answer this question: Q: Neurons are classified based on the direction in which they carry what? A:
A:
output:
nerve impulses