Maharashtra BoardEnglish MediumSTD 9ScienceHeredity and Variation3 Marks
Question
Tobacco smoking causes cancer.
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Answer
Tobacco smoke contains harmful chemicals like pyridine, ammonia, aldehyde furfural, carbon monoxide, nicotine, sulphur dioxide etc.
They cause uncontrolled cell division.
Tobacco smoke is full of minute carbon particles which cause normal tissue lining of the lung to transform into thickened black tissue. This leads to cancer.
Therefore, tobacco smoking causes cancer.
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