Choose an endangered or threatened animal or plant species, and use the Internet to research what is currently being done to preserve it. What dangers is your chosen species subject to?
What will be an ideal response?
Figure 6-17 gives some examples of endangered and threatened animal species. Answers will vary based on the species that each student chooses.
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One environmental risk factor for skin cancer is
A. infection by certain viruses. B. exposure to ultraviolet light. C. diet. D. exposure to X-rays.
Most of the population of Canada lives
A. along the Pacific Coast B. along the Atlantic Coast C. in the North D. in a narrow band near the U.S. border
Which of the following esters does not have an isomeric ester?
A) methyl formate B) ethyl formate C) methyl acetate D) ethyl acetate
Chlorofluorocarbon (CFCs) molecules can stay in the stratosphere for ____.
A. 1-5 years B. 10-20 years C. 50-75 years D. 65-385 years E. 500-1,000 years