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PowerPoint Presentations: Copyright 2001, Randolph Femmer. All rights reserved.
The Bank of Spain	Wecskaop 1	Population and the Environment
	Wecskaop 2	Demographics an historical context
Retinal               DNA Sequencing PowerPoint	Wecskaop 3	Carrying Capacity and Limiting Factors
	Wecskaop 4	Exponential Mathematics
Transpiration Telomeres and Telomerase Plant Biology	Wecskaop 5	Exponential Mathematics

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Visit our Gallery of Graphs and Demographics

Sri Lanka
Notice that birth rates (green) fell more or less steadily during the 45 years depicted here.
Notice that death rates (violet) fell even more.
The result?
After almost half a century of declining birth rates,
Sri Lanka's rate of population growth was faster than ever.

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In the natural world, many phenomena exhibit variations that produce a
classical Bell-Shaped curve

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Copyright 2002, Randolph Femmer.
All rights reserved.