Part IV. Each of the numbered lines in the passage contains a mistake, underline and correct it. (10 points) Plants and animals hold medicinal, agriculture, ecological value. Endangered species must be protected and saved so that future generations can experience their presence and value. Plants and animals are responsible for a variety for useful medications. In fact, about forty percentage of all prescriptions written today are composed from the natural compounds of different species. These species not only save live, but they contribute to a prospering pharmaceutical industry worth over $40 billions annually. Unfortunately, only 5% of know plant species have been screened for their medicinal values, although we continue to lost up to 100 species daily. The Pacific yew, a slow-grow tree found in the ancient forests of the Pacific Northwest, was historical considered a "trash" tree. However, a substance in its bark was recently identified as one of the more promising treatments for ovarian and breast cancer. Additionally, more than 3 million American heart disease sufferers would die with 72 hours of a heart attack without digitalis, a drug derived from the purple foxglove. 0. agricultural 1. …………………. 2. …………………. 3. …………………. 4. …………………. 5. …………………. 6. …………………. 7. …………………. 8. …………………. 9. …………………. 10. ………………….