Problem:OPTIONS:
- fossil compounds
- carbon
- coal fuels
- fossil fuels

Q: Burning trees produces most of the same pollutants as burning what? A:
****
A: fossil fuels

Q: Amino acids broken down by metabolic process are mostly recycled into new what? A:
OPTIONS:
- lipids
- hormones
- enzymes
- proteins
proteins

Q: What prevents solutes that have accumulated in the xylem from leaking back into the soil solution? A:
OPTIONS:
- the exoskeleton
- the exodermis
- the altostratus
- the endodermis

Answer: the endodermis

Question: Q: What are clouds that form on the ground called? A:
OPTIONS:
- haze
- smoke
- canopy
- fog
Answer: fog

input with options: Q: What has increased in the atmosphere throughout the history of the earth? A:
OPTIONS:
- nitrogen
- wind
- carbon
- oxygen
output: oxygen

Problem: OPTIONS:
- it slows down for a short time then speeds up
- it stays the same
- it becomes slower
- it became faster
Q: Q: What happened to chemical reactions when temperature increases? A:
Answer:
it became faster