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