label each chapter and put the number of the question you are answering. Only use the text I have pasted below at the bottom to answer all questions. respond to each questions with details and give example and site page number .
ALL QUESTIONS MUST BE ANSWERED and responses must be clear and able to be understood
answers should be in essay format
Q2. Compare the three categories of metals shown in table 6.1. Give an example of a metal from each category.
Q4. Name some of the portals of entry into the human body for toxic metals . Describe the methods by which these toxic metal may access specific portals of entry.
Q1. 1. Define the following terms: a. Pesticide
Describe the four major classes of pesticides. What are the advantages and disadvantages of each type?
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