Q: Where does evidence that magnetic reversals occur come from? Choices: - snow - Volcanoes - air - rocks on ocean floor A:
rocks on ocean floor

Q: Difference in electric potential energy are measured in what basic unit? Choices: - moles - watts - knots - volts A:
volts

Q: What do osteoblasts secrete that mineralizes to become bone matrix? Choices: - spongin - calcium - carbon - collagen A:
collagen

Q: Name the closest living relatives of tetrapods? Choices: - shrimp - spinefishes - lumpfishes - lungfishes A:
lungfishes