input: OPTIONS:
- water
- carbon
- sulfur
- oxygen Now, answer this question: Q: The last two stages of aerobic respiration require what? A:
A:
output: oxygen

Q: What is the chief organ of the urinary system? A:

OPTIONS:
- liver
- bladder
- lung
- kidney

Answer: kidney

Problem: OPTIONS:
- 92 %
- 99%
- 86 %
- 97%
Q: Q: Around what percentage of the earth's surface water is contained in the ocean? A:
Answer: 97%

Problem:OPTIONS:
- insulin
- lipids
- amino acids
- glucose

Q: What does the body derive from the breakdown of the carbohydrate-containing foods and drinks we consume? A:
****
A: glucose

Q: The stability of an ecosystem depends on the actions of what, exemplified by mushrooms on a decaying log and bacteria in soil? A:
OPTIONS:
- whitefly
- fluxes
- aphids
- decomposers
decomposers

Q: What causes fertilization to occur? A:
OPTIONS:
- accumulation and an egg fuse
- tissue and an egg fuse
- genetic and an egg fuse
- sperm and an egg fuse

Answer:
sperm and an egg fuse