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 Why does ecological succession occur?

Answer Ecological succession, the process of change with an ecological community, occurs for two basic reasons. Either the relationships between organisms in a community change or the physical state of th... Read More »
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Ecological Succession Classroom Activities?

Ecological succession is the pattern of changes that occur in the types of organisms that exist in a certain ecosystem and how those organisms change because of natural disturbances. It can be much... Read More »
http://www.ehow.com/info_8029405_ecological-succession-classroom-activities.html

When does secondary succession occur?

Secondary succession begins on soil that has been cleared of vegetation by fire or agricultural practices. For example, a field is burned by wildfire. Grasses begin to grow first, followed by small... Read More »
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What is the next succession after the Secretary of Homeland Security for the order of the presidential succession?

There is none; the Secretary of Homeland Security is last (18th) in the presidential line of succession. As of now, the Secretaries of Commerce and Labor are not natural-born citizens of the United... Read More »
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Dividing an airbase into multiple sectors or zones before hostilities occur allows a commander to assigh threat-based protective actions and MOPP levels for individual areas when an attack occur this?

No you dont want to go its good you have a heart but people are running around theres no medical supplies theres prisoners for the jail walking around i beg you stay in the US
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