List the Pivot Table Formulas in Excel 2010 and Excel 2013. 1  Select any cell in the pivot table. 2  On the Ribbon, under the PivotTable Tools tab, click the Options tab (Analyze tab in Excel 2013). 3  In the Calculations group, click Fields, Items & Sets. 4  Click List Formulas.
In the process of natural selection, individuals in a population who are well-adapted to a particular set of environmental conditions have an advantage over those who are not so well adapted.
Density independent factors limit population sizes in an ecosystem due to events that occur regardless of the density of a certain population. Density independent factors include environmental stresses, weather, sudden climate changes, environmental pollutants and nutrition limitations.