B.1.39
Describe how ecosystems can be reasonably stable over
hundreds or thousands of years. Understand that if a disaster such as flood or
fire occurs, the damaged ecosystem is likely to recover in stages that
eventually result in a system similar to the original one.
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Molecules and Cells |
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Developmental and
Organismal Biology |
Genetics
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Evolution |
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B.1.32 Explain how natural selection leads to organisms that are
well suited for survival in particular environments, and discuss how natural
selection provides scientific explanation for the history of life on Earth as
depicted in the fossil record and in the similarities evident within the
diversity of existing organisms. |
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B.1.36 Trace the relationship between environmental changes and
changes in the gene pool, such as genetic drift and isolation of
sub-populations. |
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Ecology |
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7.4.2 Describe that all organisms, including the human species,
are part of & depend on two main interconnected global food webs, the
ocean food web & the land food web. |
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7.4.8 Understand & explain that as any population of
organisms grows, it is held in check by one or more environmental factors.
These factors could result in depletion of food or nesting sites and/or
increased loss to increased numbers of predators or parasites. Give examples
of some consequences of this. |
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B.1.37 Explain that the amount of life any environment can
support is limited by the available energy, water, oxygen, and minerals, and
by the ability of ecosystems to recycle the residue of dead organic
materials. Recognize, therefore, that human activities and technology can
change the flow and reduce the fertility of the land. |
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B.1.40 Understand and explain that like many complex systems,
ecosystems tend to have cyclic fluctuations around a state of rough
equilibrium. However, also understand that ecosystems can always change with
climate changes or when one or more new species appear as a result of
migration or local evolution. |
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B.1.41 Recognize that and describe how human beings are part of
EarthÕs ecosystems. Note that human activities can, deliberately or
inadvertently, alter the equilibrium in ecosystems. |
Historical
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