Homework Help Pleaze!!!!!! I left my book at school HELp?

5th question The chemicals in cigarette smoike are known to cause cancer. Propoose a series of steps that could lead ti developement of lung cancer in a smoker.

6th question In an experiment with rats, the treatment group is exposed to tradition while the control group is not. Months later, the treatment group has a greater percentage of rats with cancer and more newborn rats with birth defects than the control group. Explain the exposure to radiation may have affected the treatment groups Dna. Infer how these effects could have caused the cancer and birth defects.

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