Q: What is the common term for the chemical formula h 2 0? Choices: - hydrogen - air - oxygen - water A:
water

Q: The geologic time scale is divided into eons, eras, periods, and? Choices: - cultures - tropics - zones - epochs A:
epochs

Q: Q: Rising air currents carry water vapor into what? Choices: - stratosphere - ionosphere - troposphere - atmosphere A:
A: atmosphere

Question: Q: What two basic types of feather does a bird have? Choices: - carrying and down - up and down - flight and landing - flight and down A:
Answer: flight and down

*Question*
Q: Which competition leads to one species going extinct or both becoming more specialized? Choices: - intraspecific - beneficial - mimicry - interspecific A:
**Answer**
interspecific

Q: Q: Where are unsaturated fatty acids commonly found? Choices: - animal products - butter - fish - oil A:
A: oil