Question: Q: What parts of comets make them easy to see? A:
OPTIONS:
- arcs and tails
- novas and tails
- craters and tails
- comas and tails
Answer: comas and tails

input with options: Q: What scale measures acidity? A:
OPTIONS:
- frequency scale
- richter scale
- salinity scale
- ph scale
output: ph scale

Q: Q: A visual "copy" of an object that is formed by reflected or refracted light is called what? A:

OPTIONS:
- mirror
- instance
- photo
- image

A: image

input: OPTIONS:
- diffraction
- metamorphism
- bifurcation
- superposition Now, answer this question: Q: What is the position of rock layers and the relative ages called? A:
A:
output: superposition

Q: What is the exchange of plasmids by prokaryotes called? A:

OPTIONS:
- biochemical transfer
- artificial transfer
- transcription
- genetic transfer

Answer: genetic transfer

Q: Q: What type of organism, including sea stars and sand dollars, is named for their spiny skin? A:

OPTIONS:
- mollusks
- diatoms
- chordates
- echinoderms

A:
echinoderms