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