Analyze the image shown here depicting six sampling sites in and around the Long Island Sound heading towards the Atlantic Ocean. A marine biologist samples mussels along the six sites in the sound. What hypothesis is most likely supported by the data?

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.'