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Biology Unit 5 Review
Test Description: Play these games, pass the Unit 5 test! It is just that easy.
Instructions: Answer all questions to get your test result.
1) Which statement is the best description of an ecosystem?
A
An ecosystem grows exponentially unless a factor limits it.
B
An ecosystem is a community and its surrounding nonliving environment.
C
An ecosystem is a large tract of land that includes many species.
D
An ecosystem is made up of individuals of the same species in the same place.
2) A large geographic area dominated by specific types of plants and animals and characterized by a distinct climate is called __________.
A
a biome
B
a biosphere
C
a biodiversity
D
an ecosystem
3) Which biome covers the largest part of earth?
A
forest
B
grassland
C
desert
D
marine
4) Which of the following most accurately demonstrates the order of energy flow in an ecosystem?
A
sun→bird→worm
B
eagle→rabbit→grass
C
grass→mouse→grasshopper
D
sun→alga→small fish
5) Early one spring, a group of bird-watchers counted 30 different species of birds in a tract of forest. In the early spring two years later, the bird-watchers counted 15 species in the same area. Which statement best summarizes this situation?
A
Birds follow different migratory paths each year.
B
Human beings disrupt the presence of animals in ecosystems.
C
It is important to study living things to better understand the earth.
D
The forest shows a decrease in biodiversity.
6) Which types of organisms recycle the organic molecules of dead organisms at all trophic levels and return their nutrients to the environment?
A
decomposers
B
parasites
C
herbivores
D
carnivores
7) Which statement best describes the term biodiversity?
A
the total number of different species in an area
B
the total size of a population of a single species
C
the number of communities in an ecosystem
D
the number of trophic levels in a food web
8) Which statement best summarizes the water cycle?
A
Water in the atmosphere must be converted to another chemical before animals can use it.
B
None of the above.
C
The water on earth changes forms as it moves from one reservoir to another.
D
As water moves through an ecosystem, its energy is lost between trophic levels.
9) Which trophic level contains the organisms that are the source of all chemical energy used in an ecosystem?
A
producers
B
decomposers
C
herbivores
D
parasites
10) Which statement best describes how organisms use nitrogen?
A
Animals absorb nitrogen from the air they breathe and incorporate it into their tissues.
B
Certain bacteria convert nitrogen to a form animals can use, and animals obtain their nitrogen by inhaling this nitrogen.
C
Plants absorb nitrogen from the air in photosynthesis and add it to the sugars they produce.
D
Certain bacteria living in the roots of plants convert nitrogen to a form plants can use, and animals obtain their nitrogen b
11) What is the largest reservoir of nitrogen?
A
atmosphere
B
trees
C
soil
D
marine organisms
12) All penguins living together in one area are called a __________.
A
species
B
food chain
C
population
D
community
13) During the summer in the Arctic, mosquitoes breed exponentially. When winter comes, the population decreases dramatically due to a limiting factor. What is most likely the limiting factor in this situation?
A
no vegetation
B
more sunlight
C
excess of food
D
colder temperatures
14) Which phrase best describes a community?
A
the different types of predators in an area
B
the various species of plants in an area
C
all populations of organisms living in an area
D
all biotic and abiotic factors in an area
15) What is an abiotic factor in a tropical rain forest?
A
the top predator
B
the plant life
C
the rain
D
the trees
16) Which of the following can be considered an ecosystem?
A
a population of fish in a small lake
B
the community of organisms within a desert
C
an entire desert, including abiotic and biotic factors
D
the wood of a rotting log
17) Which of the following consequences occurred when sea otters were overhunted along the Pacific Coast?
A
Many fish lost their habitats as kelp was destroyed by sea urchins.
B
The population of sea otters on the Pacific Coast went extinct.
C
Kelp came to grow out of control.
D
The sea urchin population was reduced to dangerous levels.
18) To identify a biome, which types of information would be most helpful?
A
predator and prey types
B
highest latitude measurement
C
longitude
D
climate and plant and animal life
19) Which statement is true about biomes?
A
Biome types only refer to areas on land, not water.
B
Land biomes are more complex than water biomes.
C
Many types of water and land biomes exist on earth.
D
There are many types of land biomes, but only one type of water biome.
20) Ten square miles of temperate forest has a larger variety of organisms than 10 square miles of taiga. What does the temperate forest have more of?
A
producers
B
abiotic factors
C
biodiversity
D
succession
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