Polychlorinated biphenyls:Question 13Select one:a.are POPs.b.break down easily in the environment.c.are endocrine disruptors.d.Both A and C

Break Down the Problem

1. Identify the characteristics of polychlorinated biphenyls (PCBs).
2. Assess the definitions and implications of being classified as Persistent Organic Pollutants (POPs) and as endocrine disruptors.
3. Analyze the options provided in the question.

Relevant Concepts

1. Persistent Organic Pollutants (POPs): These are organic compounds that are resistant to environmental degradation and therefore persist in the environment.
2. Endocrine Disruptors: These are substances that can interfere with the hormonal systems of organisms.

Analysis and Detail

1. Option A: PCBs are categorized as POPs due to their persistence in the environment and ability to bioaccumulate.
2. Option B: PCBs do not break down easily in the environment; they are, in fact, quite stable and can remain for long periods.
3. Option C: PCBs have been identified as endocrine disruptors influencing hormone systems in wildlife and humans.
4. Option D: This option suggests that both A and C are true.

Verify and Summarize

• Option A is true (PCBs are POPs).
• Option C is true (PCBs are endocrine disruptors).
• Option B is false (they do not break down easily).
• Thus, option D (Both A and C) is the correct choice.

Final Answer

The correct answer is d. Both A and C. Polychlorinated biphenyls are classified as Persistent Organic Pollutants and are known to be endocrine disruptors.