*Question*
Q: Acceleration is a vector, and thus has a both a magnitude and what else? Choices: - temperature - pressure - wavelength - direction A:
**Answer**
direction

*Question*
Q: As the prokaryotic cell size increases, what happens to its surface area-to-volume ratio? Choices: - stagnates - halts - increases - decreases A:
**Answer**
decreases

*Question*
Q: Found in cord blood and other sources, what kind of cells hold the promise of renewing and repairing body tissues? Choices: - red blood cells - white blood cells - neurons - stem cells A:
**Answer**
stem cells

*Question*
Q: What is the color of mercury oxide? Choices: - yellow - orange - green - red A:
**Answer**
red