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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 is made up of individuals of the same species in the same place.
B
An ecosystem is a large tract of land that includes many species.
C
An ecosystem is a community and its surrounding nonliving environment.
D
An ecosystem grows exponentially unless a factor limits it.
2) A large geographic area dominated by specific types of plants and animals and characterized by a distinct climate is called __________.
A
an ecosystem
B
a biosphere
C
a biodiversity
D
a biome
3) Which biome covers the largest part of earth?
A
desert
B
grassland
C
marine
D
forest
4) Which of the following most accurately demonstrates the order of energy flow in an ecosystem?
A
grass→mouse→grasshopper
B
sun→bird→worm
C
eagle→rabbit→grass
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
It is important to study living things to better understand the earth.
B
Human beings disrupt the presence of animals in ecosystems.
C
Birds follow different migratory paths each year.
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
parasites
B
decomposers
C
carnivores
D
herbivores
7) Which statement best describes the term biodiversity?
A
the total number of different species in an area
B
the number of trophic levels in a food web
C
the total size of a population of a single species
D
the number of communities in an ecosystem
8) Which statement best summarizes the water cycle?
A
As water moves through an ecosystem, its energy is lost between trophic levels.
B
The water on earth changes forms as it moves from one reservoir to another.
C
Water in the atmosphere must be converted to another chemical before animals can use it.
D
None of the above.
9) Which trophic level contains the organisms that are the source of all chemical energy used in an ecosystem?
A
parasites
B
producers
C
herbivores
D
decomposers
10) Which statement best describes how organisms use nitrogen?
A
Certain bacteria convert nitrogen to a form animals can use, and animals obtain their nitrogen by inhaling this nitrogen.
B
Animals absorb nitrogen from the air they breathe and incorporate it into their tissues.
C
Certain bacteria living in the roots of plants convert nitrogen to a form plants can use, and animals obtain their nitrogen b
D
Plants absorb nitrogen from the air in photosynthesis and add it to the sugars they produce.
11) What is the largest reservoir of nitrogen?
A
marine organisms
B
atmosphere
C
trees
D
soil
12) All penguins living together in one area are called a __________.
A
community
B
population
C
food chain
D
species
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
all biotic and abiotic factors in an area
B
the different types of predators in an area
C
the various species of plants in an area
D
all populations of organisms living in an area
15) What is an abiotic factor in a tropical rain forest?
A
the rain
B
the trees
C
the top predator
D
the plant life
16) Which of the following can be considered an ecosystem?
A
the community of organisms within a desert
B
an entire desert, including abiotic and biotic factors
C
the wood of a rotting log
D
a population of fish in a small lake
17) Which of the following consequences occurred when sea otters were overhunted along the Pacific Coast?
A
Kelp came to grow out of control.
B
The population of sea otters on the Pacific Coast went extinct.
C
Many fish lost their habitats as kelp was destroyed by sea urchins.
D
The sea urchin population was reduced to dangerous levels.
18) To identify a biome, which types of information would be most helpful?
A
longitude
B
climate and plant and animal life
C
predator and prey types
D
highest latitude measurement
19) Which statement is true about biomes?
A
Land biomes are more complex than water biomes.
B
Many types of water and land biomes exist on earth.
C
Biome types only refer to areas on land, not water.
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
biodiversity
B
producers
C
abiotic factors
D
succession
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