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Biology Term 2 Revision
Ecosystemss, Habitats and Niches, Energy in Ecosystems, Populations, Classification keys
14
Biology
10th Grade
06/09/2009

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Term

2.1 ECOSYSTEMS

Define: Species

 

Definition

A group of organisms that can interbreed and produce fertile offspring. 

Term

2.1 ECOSYSTEMS

Define: Habitat

Definition

The environment in which a species normally lives or the location of a living organism.

Term

2.1 ECOSYSTEMS

Define: Population

Definition

A group of organisms of the same species who live in the same area at the same time.

Term

2.1 ECOSYSTEMS

Define: Community

Definition

A group of populations living and interacting with each other in an area. 

Term

2.1 ECOSYSTEMS

Define: Ecosystem

Definition

A community and its abiotic environment.

Term

2.1 ECOSYSTEMS

Define: Ecology

Definition

The study of relationships between living organisms and between organisms and their environment.

Term

2.1 ECOSYSTEMS

Distinguish and discuss Abiotic and Biotic Factors.


Description:

A community comprises all of the organisms within an ecosystem. Both Abiotic (phyisical) and biotic factors affect the organsisms in a community, influencing their distribution and their survival, growth and reproduction.

 

Definition

Community: Biotic Factors

Producers, Consumers, Detrivores, Decomposer

Physical environment: Abiotic Factors

ATOMOSPERE: wind, speed and direction, humidity, light intensity and quality, precipitation, air temperature.

SOIL: Nutrient availability, soil moisture, soil pH, composition, temperature.

WATER: Dissolved nutrients, pH and salinity, dissolved oxygen, temperature.

 

 

 

 

Term

2.1 ECOSYSTEMS

Define: Autotroph

An organism that synthesizes its organic molecules from simple inorganic substances eg plants (photosynthesis).


Definition

Term

2.1 ECOSYSTEMS

Define: Heterotroph

An organism that obtain its organic molecules from other organisms, i.e animals

Definition
Term

2.1 ECOSYSTEMS

Define: Consumer

Definition

An organism that ingests other organic matter that is living or recently killed.

Term

2.1 ECOSYSTEMS

Define: Detritivore

Definition

An organism that ingests the non-living organic matter. i.e woodlice eat damp rotten wood.

Term

2.1 ECOSYSTEMS

Define: Saprotroph

Definition

An organism that living on or in non-living organic matter, secreting digestive enzymes into it and absorbing the products of digestion. i.e fungi


 

Term

2.1 ECOSYSTEMS

Explain how the components of an ecosystem influence one another.

Definition
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