Q: What force is greater on rougher surfaces than smooth surfaces? Choices: - tension - acceleration - gravity - friction A:
friction

Q: Exchange occurs directly with the external environment in what type of organisms? Choices: - hematopoietic organisms - cell clusters - multicellular organisms - unicellular organisms A:
unicellular organisms

Q: Q: What are kpa, atm, and mmhg measurement units for? Choices: - temperature - weight - velocity - pressure A:
A: pressure

Question: Q: The concentration of hydrogen ions in a solution is called? Choices: - alkalinity - alcohol - moisture - acidity A:
Answer: acidity

*Question*
Q: The contents of which organ are mixed every 20 seconds? Choices: - the metabolism - pancreas - kidney - the stomach A:
**Answer**
the stomach

*Question*
Q: What effect occurs when a few individuals start, or found, a new population? Choices: - divergent - convergent - pioneer - founder A:
**Answer**
founder