Q: Colloids are used industrially as what? Choices: - organisms - impurities - solutions - catalysts A:
catalysts

Q: Synaptic connections can change over time depending on what? Choices: - weight - diet - age - activity level A:
activity level

Q: Q: The as yet undiscovered grand unified theory is a search to unify laws of what branch of science? Choices: - genetics - chemistry - masses - physics A:
A: physics

Question: Q: What paired organs together receive about 25 percent of cardiac output and are protected in the retroperitoneal space by the renal fat pad and overlying ribs and muscle? Choices: - hands - lungs - brain - kidneys A:
Answer: kidneys

*Question*
Q: Name what nutrient cycling is strongly regulated by. Choices: - elevation - abundance - sunlight - vegetation A:
**Answer**
vegetation

*Question*
Q: Salt in seawater causes it to have greater what, which is also affected by temperature and pressure? Choices: - mass - volume - area - density A:
**Answer**
density