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1
In nature, a population is
A)all the organisms living in a particular geographic area.
B)all organisms that are able to breed with one another.
C)all the organisms and the non-living parts of the environment interacting in an area.
D)a group of individuals of the same species living in the same geographic area.
2
All the ecosystems in the world and their interactions make up the
A)community.
B)biotic part of the environment.
C)biosphere.
D)abiotic part of the environment.
3
A tropical rainforest is an example of
A)a biome.
B)a biosphere.
C)a range.
D)an ecological niche.
4
The size of a population depends on
A)its habitat.
B)limiting factors.
C)its birth rate.
D)its death rate.
5
An owl eating a mouse is an example of
A)an abiotic limiting factor.
B)a biotic interaction.
C)a niche.
D)an ecosystem.
6
Average annual rainfall is an example of
A)the climate.
B)a biotic limiting factor.
C)an abiotic limiting factor.
D)a biome.
7
All living things are classified in
A)three kingdoms.
B)one kingdom.
C)six species.
D)six kingdoms.
8
The first word in the scientific name of an organism, such as Homo sapiens, is its
A)genus.
B)species.
C)family.
D)class.
9
Competition for resources
A)occurs only within a species.
B)occurs both within species and between different species.
C)occurs only between different species.
D)is an example of an abiotic limiting factor.
10
Ecosystems
A)include both biotic and abiotic components.
B)always occupy large areas.
C)remain unchanged over time.
D)consist mainly of interactions between plants and animals.





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