CONTENT:

  1. Factors affecting a population
  2. Dynamic population
  3. Family planning

 

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

1. Abiotic factors these factors are:

(a) Availability of space

(b) Light

(c) Heat

(d) Oxygen (air)

(e) Water

(f) Food

2. Biotic factors: these factors are

(a) Predation

(b) Competition

(c) Parasitism

(d) Diseases

(e) Natality

(f) Mortality

(g) Territorial behaviour

(h) Dispersal

EVALUATION

  1. List five factors (abiotic ) that contribute to the balance in nature.
  2. List five factors (biotic) that contribute to the balance in nature.

 

DYNAMIC EQUILIBRIUM

The biotic community in each ecosystem is composed of population of many species.

Lesson tags: Biology Lesson Notes, Biology Objective Questions, SS3 Biology, SS3 Biology Evaluation Questions, SS3 Biology Evaluation Questions Second Term, SS3 Biology Objective Questions, SS3 Biology Objective Questions Second Term, SS3 Biology Second Term
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