19.4 Populations
- Syllabus
- 0610–2026–2027
- Topic
- 19.4
- Level
- —
19.4.1—Population as a group of organisms
- Describe a population as a group of organisms of one species, living in the same area, at the same time
19.4.2—Community as all of the populations
- Describe a community as all of the populations of different species in an ecosystem
19.4.3—Ecosystem as a unit containing
- Describe an ecosystem as a unit containing the community of organisms and their environment, interacting together
19.4.4—Factors affecting the rate
- 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
19.4.5—Lag, exponential (log), stationary
- 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
19.4.6—Interpret graphs and diagrams
- Interpret graphs and diagrams of population growth
19.4.7—Factors that lead to each phase
- Explain the factors that lead to each phase in the sigmoid curve of population growth, making reference, where appropriate, to the role of limiting factors
Objective notes
7 learning objectivesConceptIGCSE Biology