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Ecosystems And Organisms
Test Description: 2nd 1/2
Instructions: Answer all questions to get your test result.
1) A goup of land ecosystems with similar climates and organisms is called a(n)
A
biome
B
energy pyramid
C
food web
D
climate
2) Which biome receives less than 25 cm of rain per year?
A
desert
B
tundra
C
mountain
D
grassland
3) Which ecosystem is found where the freshwater of a river meets the saltwater of the ocean?
A
estuary
B
rocky intertidal zone
C
neritic zone
D
surface zone
4) A large variety of plants grow in the tropical rainforest because
A
many insects live there
B
it has very good soil
C
it is warm, humid, and rainy
D
the forest floor is very dark
5) Which of the following is the biotic factor in a prairie ecosystem?
A
sunlight
B
water
C
soil
D
grass
6) The smallest unit of ecological organization is a single
A
organism
B
ecosystem
C
population
D
community
7) The largest population that an environment can support is called its
A
carrying capacity
B
limiting factor
C
birth rate
D
death rate
8) An organism's particualr role in its habitat, or how it makes its living, is called its
A
niche
B
competition
C
carrying capacity
D
ecosystem
9) Which statement best explains why few plants grow on a tropical rainforest floor?
A
temperatures in a tropical rainforest stay warm
B
many different kinds of animals live on the rainforest floor
C
layers of trees keep sunlight from reaching the forest floor
D
heavy rains fall throughout the year
10) the struggle between organisms to survive in a habitat with limited resources is called
A
symbiosis
B
competetion
C
parasitism
D
predation
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