Q: What is the most common cause of cancer? Choices: - poor diet - smoking - technology mutations - cell mutations A:
cell mutations

Q: The science of analyzing tree rings is called what? Choices: - algorithms - conservation - estradiol - dendrochronology A:
dendrochronology

Q: To undo the tarnish on copper pennies, you can place them in what liquid? Choices: - distilled water - honey - seawater - vinegar A:
vinegar

Q: When female mammalian embryos consist of just a few thousand cells, one x chromosome in each cell inactivates by condensing into a structure called what? Choices: - lewy's body - morton body - baker body - barr body A:
barr body