Supporting a Position with Evidence
Developed by Alexis Aguilar

Select one of the statements below. Use the statement as the first sentence in a paragraph. Write one or two paragraphs (150-250 words) providing evidence to support your statement. Evidence may include specific examples, case studies, expert opinion, and your own experience.

• The broad geographic ranges of many plants can in part be explained by winter temperatures.
• Small birds often have winter range limits that are apparently dictated by low temperatures.
• A clear biogeographic relationship exists between water availability and the places where plant species are found growing.
• If a predator depends on only one prey species, the geographic distribution of the predator is limited to the geographic distribution of the prey species.
• Competitive exclusion of one species by another species may be an important factor in determining range limits.
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