MEC 280 - Quiz 1 .docx - 4b Three reasons why one of these...

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MEC 280 Quiz #1 – Answers 1a. The subtitle of the ecology movie “Race to save the planet” is Remnants of Eden. 1b. Many species have already become extinct; however, the exact number is unknown. 2a. 30 million species exist roughly on the planet. 2b. At least 1/3 of the species on this planet have been gravely threatened by humans. 3a. A little more than 10% (or 1/10) of the world’s animal tissue is comprised of ants. 3b. One important use of ants is that they process vegetation, returning nutrients to the soil to keep the forests alive. In return, trees take in carbon dioxide and release oxygen. 4a. The three kinds of wealth that each country has are material, cultural and biology.

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