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biology 0610printed 265 · PDF 265
328 pagesrevision 46933
printed 265 · PDF 265
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Core Supplement
1 Describe a population as a group of organisms of
one species, living in the same area, at the same
time
2 Describe a community as all of the populations
of different species in an ecosystem
3 Describe an ecosystem as a unit containing the
community of organisms and their environment,
interacting together
4 Identify and state the factors affecting the rate
of population growth for a population of an
organism, limited to food supply, competition,
predation and disease
5 Identify the lag, exponential (log), stationary 7 Explain the factors that lead to each phase in
and death phases in the sigmoid curve of the sigmoid curve of population growth, making
population growth for a population growing in an reference, where appropriate, to the role of
environment with limited resources limiting factors
Interpret graphs and diagrams of population
growth
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