When molecules undergo passive transport which way do they move?

Ans.

Mutagens are chemical or physical agents, having ability to alter the genetic material of an individual and cause mutations. Physical mutagens are physical agents or substances, such as gamma rays, X-rays, and UV rays.

Chemical mutagens include those chemicals that can cause mutations, such as nicotine, ethylene bromide, and nitrosamines. Tobacco is a chemical mutagen as it contains various mutation-causing chemicals, such as nicotine and nitrosamine.

Thus, the correct answer is option). 'tobacco.'