Q: What does pushing an object over the surface of a ramp cause? Choices: - Acceleration - vibration - tension - friction A:
friction

Q: Which carrier molecule becomes less effective at binding oxygen as temperature increases? Choices: - water - helium - hydrogen - hemoglobin A:
hemoglobin

Q: What forms when the dna in the nucleus wraps around proteins? Choices: - rna - genes - ribosomes - chromosomes A:
chromosomes