19. (3 points) Mouse embryonic stem cells (mESCs) can be differentiated into ost

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19. (3 points) Mouse embryonic stem cells (mESCs) can be differentiated into osteoblasts, but the differentiation efficiency is never 100% and the osteoblasts will be mixed with many other cell types. In addition, there are no known cell surface markers for osteoblasts. Describe how you could identify and sort out LIVE osteoblasts differentiated from mESCs? ??, win fl-orese Cosicob ki,)·è re^ serek Fla. Cg.mel (3 points) Smoking is clinically linked to lung cancer development and abnormal fetus development. That is why pregnant women are strongly recommended not to smoke. Mechanisms underlying the adverse effect of chemical components in tobaccos on human fetus development are unknown. Describe how you could study the effect of tobacco chemicals on early human fetal development without using any human subjects (born or unborn). o cell colontes

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