Basis for Ecology
Organisms and Their Relationships
Symbiotic Relationships
Types of Organisms
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100
All the living organisms that inhabit an environment.
What are Biotic Factors?
100
The place where an organism lives out its life.
What is a Habitat?
100
The symbiotic relationship in which one species benefits, and the other species is neither harmed nor benefited.
What is Commensalism?
100
The organism that cannot make its own food and feeds on other organisms such as autotrophs or other heterotrophs or both.
What are Heterotrophs?
100
All the strategies and adaptations a species uses in its environment.
What is a Niche?
200
The study of interactions that take place between organisms and their environment.
What is Ecology?
200
The portion of the earth that supports all living things.
What is the Biosphere?
200
The symbiotic relationship in which one organism benefits at the expense of another organism.
What is Parasitism?
200
Organisms that break down the complex compounds of dead and decaying plants and animals into simpler molecules.
What are Decomposers?
200
The total mass of living material available at each trophic level.
What is the Pyramid of Biomass?
300
All the nonliving parts of an organism's environment.
What are Abiotic Factors?
300
The group of organisms of the same species.
What is a Population?
300
The symbiotic relationship in which both species benefits.
What is Mutualism?
300
A type of heterotroph that eats only plants.
What is a herbivore?
300
The simplest model that shows how energy flows though the ecosystem.
What is a Food Chain?
400
A group of organisms that can interbreed and produce fertile offspring.
What is a Species?
400
Made up of interacting populations in a biological community and the community's abiotic factors.
What is an Ecosystem?
400
The close relationship that exists when two or more species live together.
What is Symbiosis?
400
Organism that collects energy from the sunlight or inorganic substances to produce food.
What is an Autotroph?
400
Each step in a food chain or food web.
What is a Trophic Level?
500
Any living thing.
What is an Organism?
500
Made up of interacting populations in a certain area at a certain time.
What is a Biological Community?
500
The symbiotic relationship that is formed between a flea and a dog.
What is Parasitism?
500
Heterotrophs that prey on other heterotrophs.
What are Carnivores?
500
The model representing the many interconnected food chains and pathways in which energy flows through a group of organisms.
What is a Food Web?
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