*Question*
Q: Hydropower is generated with what natural resource? Choices: - light - air - fire - water A:
**Answer**
water

*Question*
Q: What color light is actually the absence of electromagnetic waves in the visible spectrum, for humans? Choices: - ultraviolet light - infrared light - blue light - black light A:
**Answer**
black light

*Question*
Q: Reef sponges typically have what type of beneficial relationships with other reef species? Choices: - parasitic - microbes - mutual - symbiotic A:
**Answer**
symbiotic

*Question*
Q: Do motile cilia usually occur in small or large numbers on the cell surface? Choices: - neither - mixed - small - large A:
**Answer**
large