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Summary Life Science IEB definitions by section $4.82   Add to cart
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Summary Life Science IEB definitions by section
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  • Course
  • Life Sciences
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  • 12th Grade

Looking for a list of definitions that will get you ALL the marks - try this one. I achieved 95% in Life Science in matric. These notes made my learning a bit easier and I hope they can do the same for you. Check out my other Life Science notes for more help. Your money will go to the Restory F...

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  • February 9, 2024
  • 13
  • 2023/2024
  • Summary

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  • life science

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  • 12th Grade
  • Life Sciences
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Zoe Pearson


Population ecology


Ecology
The study of interactions between living organisms and the environment they live in

Population ecology
Concerned with the fluctuations in size of a pop. and factors, both physical and social that
regulate these fluctuations.

Population
A group of orgs of the same species that occupy the same area and can breed freely with
each other

Biosphere
The part of earth where living organisms are found

Ecosystem
Made up of groups of different species of organisms that interact with each other and the
environment

Organism
An individual form of life, composed of a single cell or a complex of cells that are capable of
growing and reproducing

Community
A group of different species that inhabit and interact in a particular area

Species
A group of closely related organisms that are very similar to each other and are capable of
interbreeding to produce fertile offspring

Population size
The total number of individuals in a population

Limiting factors
The factors that help to regulate the growth of a population

Density independent factors
Factors that limit the growth of a population as a result of natural factors and not because of
the density or number of organisms

Density dependent factors
Factors that have a greater effect when the population density is high

Closed population
A population where with no immigration or emigration, the only factors affecting any change
in population numbers will be births and deaths

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