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Test Description: Ch. 21 Populations and Communities
Instructions: Answer all questions to get your test result.
1) parts of the Earth and the atmosphere where there is life
A
population
B
parasitism
C
commensalism
D
biosphere
2) potential growth of a population in perfect conditions with no limiting factors
A
habitat
B
birthrate
C
biotic potential
D
migration
3) largest number of individuals of one species that an environment can support
A
population density
B
mutualism
C
commensalism
D
carrying capacity
4) struggle in a community for the same resources
A
competition
B
endangered species
C
consumer
D
extinct species
5) anything that restricts the size of a population
A
predator
B
limiting factor
C
death rate
D
niche
6) all the organisms of the same species that live in the same area at the same time
A
habitat
B
population density
C
symbiosis
D
population
7) size of a population compared to the amount of space available
A
exponential
B
threatened species
C
carrying capacity
D
population density
8) number of offspring produced over a given time period
A
birthrate
B
estimate
C
commensalism
D
biotic potential
9) number of individuals that die over a given time period
A
threatened species
B
parasitism
C
death rate
D
endangered species
10) population that is at risk of extinction
A
mutualism
B
biosphere
C
endangered species
D
limiting factor
11) to determine roughly the size, nature, or extent of something
A
estimate
B
exponential
C
niche
D
limiting factor
12) mathematical expression that contains a constant raised to a power
A
exponential
B
carrying capacity
C
parasitism
D
symbiosis
13) population that has died out
A
death rate
B
limiting factor
C
extinct species
D
threatened species
14) instinctive seasonal movement of population
A
mutualism
B
commensalism
C
migration
D
population density
15) population at risk but is not yet endangered
A
limiting factor
B
threatened species
C
symbiosis
D
habitat
16) symbiotic relationship that benefits one species but does not harm or benefit another
A
mutualism
B
commensalism
C
competition
D
niche
17) organism that gets energy by eating other organisms
A
extinct species
B
predator
C
consumer
D
parasitism
18) place within an ecosystem where an organism lives
A
niche
B
population
C
biosphere
D
habitat
19) symbiotic relationship in which both partners benefit
A
endangered species
B
exponential
C
mutualism
D
symbiosis
20) what a species does in its habitat to survive
A
competition
B
biotic potential
C
niche
D
migration
*select an answer for all questions
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