Q: Ethers readily dissolve what type of molecules? Choices: - proteins - lipids - polar - non-polar A:
non-polar

Q: In living systems, diffusion of substances into and out of cells is mediated by the what membrane? Choices: - gas - fluid - ferment - plasma A:
plasma

Q: A highway that switches back and forth as it climbs up a steep hillside, yeilding a much gentler slope, is an example of what simple machine? Choices: - lever - pulley - wheel - inclined plane A:
inclined plane