Q: What is the greatest contribution of arthropods to human food supply? Choices: - vegetation - reproduction - hibernation - pollination A:
pollination

Q: Of all the electromagnetic waves, which have the lowest frequencies? Choices: - X-rays - ultraviolet rays - gamma rays - radio waves A:
radio waves

Q: Q: What guards the opening between the right atrium and the right ventricle? Choices: - superior vena cava - brachiocephalic trunk - aorta - tricuspid valve A:
A: tricuspid valve

Question: Q: Which mineral do native americans use to decorate items? Choices: - Tanzanite - Topaz - Amethyst - turquoise A:
Answer: turquoise

*Question*
Q: What is it called when the soils of the arctic tundra remain in a perennially frozen state? Choices: - concentrated freeze - permafreeze - glacial domination - permafrost A:
**Answer**
permafrost

*Question*
Q: How do prokaryotes reproduce? Choices: - inorganically - sexually - unusually - asexually A:
**Answer**
asexually