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All of the organisms living in an area together with their physical environment

Biotic Factor

Living and once living parts of an ecosystem

Abiotic Factors

Non-Living parts of the ecosystem


An individual living thing


Group of organisms that can mate to produce fertile offspring


All the members of the same species at the same place at the same time


A group of various species that live in the same place and interact with each other


The place an organism lives

Natural Selection

To describe the survival and reproduction of organisms with particular traits

Artificial Selection

The selective breeding of organisms by humans for specific characteristics.


A change in the genetic characteristics of a population from one generation to the next


Inherited trait that increases an organisms chance of survival and reproduction in a certain environment


Ability of one or more organisms to tolerate a particular chemical designed to kill it


The unique role of a species within an eco-system


Relationship in which different individuals compete for a limited resource


An organism that lives by preying on other organisms.


Relationship between parasite and its host


Close relationship between two species in which each species benefits from each other


A relationship in which one species benefits while the other is neither harmed or benefited


Relationship in which two species live in close association

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