Biol 180 Practice Exam 7

Biol 180 Practice Exam 7 - There are 3 minutes remaining...

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There are 3 minutes remaining for you to still get full credit. (This message will update once each minute) Practice Exam 8 Tuesday, November 29 Note: hitting the Back button on your browser can cause your answers to be deleted. Once you are on this page do not leave it until you press the Submit button. 1.) The geographic ranges of many species are moving in response to climate change. In general, which species should be able to move their geographic range fast enough to keep up with climate change, and which may not be able to keep up? Consider species that are considered early successional, mid- successional, or late-successional. Explain your logic. Early successional species should be able to best most their geographic ranges because they produce many seeds and have a variety of ways of scattering the seeds over a wide area (for example dandelions' seeds blow in the wind, scattering the seeds over a wide area downwind on windy days or tumbleweeds which similarly are blown by the wind and drop seeds as they roll over a large area). Species that late-successional often produce large seeds with larger nutrient reservoirs. These seeds typically do not move further than the radius of the parent tree from which they fall. Therefore late-successional species are likely to have the most difficult time changing their ranges in response to climate change. Mid-successional species will likely fall in the middle as they mature and reproduce faster than late-succession species (and likely produce
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This note was uploaded on 03/08/2012 for the course BIOL 180 taught by Professor Freeman during the Fall '07 term at University of Washington.

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Biol 180 Practice Exam 7 - There are 3 minutes remaining...

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