input: OPTIONS:
- oxygen
- hydrogen
- nitrogen
- carbon Now, answer this question: Q: What is the most important element to life? A:
A:
output: carbon

Q: Chemical equations need to be balanced to satisfy the law of what? A:

OPTIONS:
- material of matter
- glow of matter
- speed of matter
- conservation of matter

Answer: conservation of matter

Problem: OPTIONS:
- pus
- progesterone
- collagen
- sebum
Q: Q: What does the sebaceous gland secrete which waterproofs the skin and hair? A:
Answer: sebum

Problem:OPTIONS:
- concentrated freeze
- permafreeze
- glacial domination
- permafrost

Q: What is it called when the soils of the arctic tundra remain in a perennially frozen state? A:
****
A: permafrost

Q: What blood protein carries oxygen from the lungs to cells throughout the body? A:
OPTIONS:
- plasma
- platelets
- dopamine
- hemoglobin
hemoglobin

Q: How do lancelets reproduce? A:
OPTIONS:
- asexually
- parthenogenesis
- aerobically
- sexually

Answer:
sexually