Problem: OPTIONS:
- unknown
- hundreds
- tens
- thousands
Q: Q: How many years can dissolved carbon be stored in the deep ocean? A:
Answer: thousands

Problem:OPTIONS:
- oxygen and dioxide
- phosphorus and oxygen
- dioxide and nitrogen
- nitrogen and oxygen

Q: What makes up 99 percent of air? A:
****
A: nitrogen and oxygen

Q: What can be thought of as the most biologically productive regions on earth? A:
OPTIONS:
- swamps
- forests
- coasts
- estuaries
estuaries

Q: How many processes contribute to the emergence of viral diseases? A:
OPTIONS:
- one
- four
- two
- three

Answer: three

Question: Q: What kind of organisms are yeasts? A:
OPTIONS:
- bacteria
- viruses
- protozoa
- single-celled
Answer: single-celled

input: OPTIONS:
- epipelagic
- observable zone
- mesopelagic
- aphotic zone Now, answer this question: Q: Which zone is located below 200 meters from the surface? A:
A:
output:
aphotic zone