Multiple Choice
PCBs, or polychlorinated biphenyls,
A) are used today extensively for various purposes in industry
B) are safe for aquatic organisms
C) can cause chloracne in humans and their manufacture in the US has been discontinued
D) none of these
Correct Answer:
Verified
Correct Answer:
Verified
Q2: Heavy metals such as mercury, thallium, and
Q3: The amount of a substance which is
Q4: Carcinogens are chemicals that can cause<br>A)birth defects<br>B)mutations<br>C)cancer<br>D)hair
Q5: Medications and toxins alike can enter the
Q6: The toxin arsenic occurs naturally in the
Q8: Nerve cells (neurons) are connected by<br>A)cilia<br>B)ligaments<br>C)gaps or
Q9: The insecticides parathion and malathion interfere with
Q10: Neurotoxins interfere with the<br>A)Citric Acid cycle<br>B)Krebs cycle<br>C)Acetylcholine
Q11: The insecticide DDT (p-dichlorodiphenyltrichloroethane) is<br>A)highly toxic to
Q12: Nitrogen dioxide (NO<sub>2</sub>) is<br>A)very dangerous to humans,