Q: What type of bonds do alkanes only contain? Choices: - hydrogen bonds - carbon-hydrogen bonds - hydrogen-carbon bonds - carbon-carbon single bonds A:
carbon-carbon single bonds

Q: The sodium-potassium pump is an active transport pump that exchanges sodium ions for what? Choices: - nitrogen ions - oxygen ions - chlorine ions - potassium ions A:
potassium ions

Q: Q: The planets orbit around what celestial body? Choices: - moon - earth - horizon - sun A:
A: sun

Question: Q: What type of mammals are humans? Choices: - somatic mammals - marsupial mammals - respiratory mammals - placental mammals A:
Answer: placental mammals

*Question*
Q: What color are leukocytes blood cells? Choices: - blue - black - red - white A:
**Answer**
white

*Question*
Q: What do most amphibians breathe with as larvae? Choices: - pores - lungs - nasal passages - gills A:
**Answer**
gills