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FIRST TERM: E-LEARNING NOTES
SUBJECT: BIOLOGY
CLASS: SS 3
WEEK 1: REVISION OF SUMMER SCHOOL’S WORK
WEEK 2
TOPIC: BALANCE IN NATURE
CONENT:
- Factors affecting a population
- Dynamic population
- Family planning
SUB-TOPIC ONE: FACTORS AFFECTING A POPULATION
In ecology, the interaction between plant and animals in an environment produces a stable and a balance system. A population is referred to as stable if the population size remains relatively constant.
There are many factors that contribute to the balance in nature; these factors are either abiotic or biotic
Abiotic factors these factors are:
- Availability of space
- Light
- Heat
- Oxygen (air)
- Water
- Food
Biotic factors: these factors are
- Predation
- Competition
- Parasitism
- Diseases
- Natality
- Mortality
- Territorial behaviour
- Dispersal
EVALUATION
- List five factors (abiotic) that contribute to the balance in nature
- List five factors (biotic) that contribute to the balance in nature.
SUB-TOPIC 2: DYNAMIC EQUILIBRIUM
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