input: OPTIONS:
- brg and brf
- brf2 and brf4
- brf and brf4
- brf and br2 Now, answer this question: Q: What are the two possible reduction products for brf3? A:
A:
output: brf and br2

Q: The two complementary strands of what are separated, much like unzipping a zipper, in the initiation phase? A:

OPTIONS:
- mRNA
- Chromosomes
- RNA
- dna

Answer: dna

Problem: OPTIONS:
- vibrating fields
- ocean waves
- particles fields
- oscillating fields
Q: Q: In an electromagnetic wave, what do the crests and troughs represent? A:
Answer: oscillating fields

Problem:OPTIONS:
- sedimentation
- transpiration
- vulcanism
- crystallization

Q: What is it called when crystals form from magma? A:
****
A: crystallization

Q: What devices do astronomers use to see objects at wavelengths all across the electromagnetic spectrum? A:
OPTIONS:
- microscopes
- spectrographs
- levels
- telescopes
telescopes

Q: Which part of the body has mucus and hair to trap dust and also warms and moistens air so to not harm lung tissue? A:
OPTIONS:
- the tongue
- the throat
- the ear
- the nose

Answer:
the nose