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Ecology Ecosystems
Part 1
15
Biology
9th Grade
09/27/2022

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Term
Organism
Definition
A living thing; has all the characteristics of life.
Term
Population
Definition
A group of the same species living in an area
Term
Community
Definition
All of the living things together in a specific area
Term
Ecosystem
Definition
All of the living and nonliving things together in a specific area
Term
Biosphere
Definition
The region of Earth's atmosphere that supports all forms of life
Term
Abiotic Factors
Definition
All of the nonliving things in an environment
Term
Biotic Factors
Definition
All of the living or dead things in an environment
Term
Habitat
Definition
A place where an organism lives; may be shared by more than one organism
Term
Niche
Definition
A specific role that an organism plays over the course of its entire life
Term
Immigration
Definition
When one or more organisms come into or enter an area
Term
Emigration
Definition
When one or more organisms leave or exit an area
Term
Mutualism
Definition
A symbiotic relationship between two organisms in which they both benefit, or get something good from each other
Term
Commensalism
Definition
A symbiotic relationship between two organisms in which only one benefits but does not harm or help the other organism
Term
Parasitism
Definition
A symbiotic relationship between two organisms in which one feeds of or lives off of a living organism, causing it harm but not necessarily killing it
Term
Predation
Definition
A symbiotic relationship between two organisms in which one kills and eats the other
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