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