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Chapter 21
Test Description: Review of Chapter 21
Instructions: Answer all questions to get your test result.
1) The smallest unit of ecological organization is a single
A
population
B
ecosystem
C
community
D
organism
2) The place where an organism lives and that provides the things the organism needs is called its
A
species
B
community
C
habitat
D
population
3) The largest population that an environment can support is called its
A
birth rate
B
limiting factor
C
carrying capacity
D
death rate
4) An organism's particular role in its habitat, or how it makes its living is called its
A
ecosystem
B
niche
C
carrying capacity
D
population
5) The struggle between organisms to survive in a habitat with limited resources is called
A
parasitism
B
predation
C
competition
D
symbiosis
6) A close relationship between two species that benefits at least one of the species is called
A
symbiosis
B
adaptations
C
natural selection
D
predation
7) All of the following are limiting factors EXCEPT
A
space
B
weather conditions
C
food
D
soil
8) An organism's habitat must provide all of the following EXCEPT
A
predators
B
water
C
shelter
D
food
9) The nonliving parts of an ecosystem are called
A
populations
B
biotic factors
C
organisms
D
abiotic factors
10) Which of the following describes an interaction in which one organism kills and eats another?
A
symbiosis
B
competition
C
predation
D
mutualism
11) All the different populations that live together in an area make up a(n)
A
ecosystem
B
species
C
community
D
organism
12) The study of how things interact with each other and with their environment is called
A
biotic factors
B
ecology
C
community
D
photosynthesis
13) Which of the following is a biotic factor in the prairie ecosystem?
A
soil
B
grass
C
water
D
sunlight
14) A group of antelope leaving the herd in search of better grassland is an example of
A
emigration
B
immigration
C
increasing birth rate
D
decreasing death rate
15) The behaviors and physical characteristics of species that allow them to live successfully in their environment are called
A
adaptations
B
limiting factors
C
habitats
D
biotic factors
16) To carry out photosynthesis, algae and plants use the abiotic factors sunlight, carbon dioxide and
A
water
B
temperature
C
bacteria
D
soil
17) Which of the following is an example of a predator adaption?
A
a shark's powerful jaws
B
a frog's bright colors
C
a plant's poisonous chemicals
D
a porcupine's needles
18) When a flea is living on a dog, the dog is the
A
prey
B
parasite
C
predator
D
host
19) Mutualism, commensalism and parasitism are the three types of
A
symbiotic relationships
B
predation
C
prey adaptations
D
competition
*select an answer for all questions
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