In the 10%/90% Rule,what amount is lost as heat and what amount is transferred to the next tropic level?

10% of the energy is transferred while 90% is lost through metabolic processes as heat.

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.'