Q: Answer the question

Which human body system produces the hormones that regulate growth?
OPTIONS:
- skeletal
- digestive
- circulatory
- endocrine

A: endocrine

Q: Answer the question

Certain fossils can be used to help determine the age of the rock layer in which the fossils are found. Which type of fossil is best to use when making this determination?
OPTIONS:
- marine mammal fossil
- swamp fern fossil
- trace fossil
- index fossil

A: index fossil

Q: Answer the question

Why is water considered to be a renewable resource?
OPTIONS:
- Water can be used over again.
- Water can be found all over Earth.
- Water can dissolve other substances.
- Water is needed by organisms to stay alive.

A:
Water can be used over again.