Question

question 18
read the following scenario and answer the question(s) below.
mercury is a heavy metal that occurs naturally in minerals and rocks. release of mercury from natural sources has been relatively constant over time. however, anthropogenic release of mercury has increased significantly in recent years primarily due to increased fossil fuel mining and combustion. mercury that is released into the air eventually ends up in soils or surface water. once in water, microbes convert mercury to methylmercury, which is absorbed quickly and concentrated in the tissues of predatory fish such as shark and swordfish. large fish typically concentrate more mercury than small fish. people who eat fish with high methylmercury concentrations can show tremors, deafness, muscle dysfunction, and attention deficit. pregnant women and children are especially sensitive to methylmercurys toxic effects. learning disabilities and developmental delays are common in children who have been exposed to significant levels of methylmercury.
based on the specific health effects described above, mercury would be best classified as a(n)____.
carcinogen
allergen
endocrine disruptor
neurotoxin
sponge

Explanation:

Mercury exposure causes health issues like tremors, deafness, etc. A teratogen is an agent that can cause birth defects. Pregnant women and children are especially vulnerable, and developmental delays (a form of birth defect) are common in children exposed to significant levels of methyl mercury. So mercury fits the teratogen definition.
A carcinogen causes cancer (not mentioned here). An allergen causes allergic reactions (not described). An endocrine disruptor affects the endocrine system (not the main focus here). A mutagen causes genetic mutations (not indicated).

Answer:

E. teratogen