Ques:Q: What can lead to a loss of genetic variation within populations? Choices: - migration - adaptation - natural selection - genetic drift A:

Ans:genetic drift
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Ques:Q: Scientists found that the youngest rocks on the seafloor were where? Choices: - trenches. - mid - ocean sediments - mid - ocean glaciers - mid-ocean ridges A:

Ans:mid-ocean ridges
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Ques:Q: Saliva can carry the hiv virus, but it won't spread it, unless the saliva gets into what? Choices: - lungs - kidneys - liver - bloodstream A:

Ans:bloodstream
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Ques:Q: Combining nonpolar olive oil and polar vinegar yields what type of mixture? Choices: - homogeneous - omnigeneous - amorphous - heterogeneous A:

Ans:
heterogeneous
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