Populations

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 and death phases in the sigmoid curve of population growth for a population growing in an environment with limited resources