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Unformatted text preview: stability of the field. 7: Which of the following is true? D: Bioengineered crops may not only provide a superior food but some can even be used to make plastics. 8: Which of the following is true about fishing? A: The open ocean contains little life. 9: Which of the following is true about soils? A: Soils are lost faster through erosion than they are made. 10: If 3.8 billion acres of land are currently under cultivation and if the population increases from 6.6 billion to 8 billion, how much more land would need to be cultivated, assuming everything remains unchanged? C: 0.8 billion more acres 11: From Figure 13-9, estimate the number of metric tons of grain produced per hectare worldwide in 1980. D: About 2.6 tons...
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This document was uploaded on 02/01/2011.
- Spring '09