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Unit 7 Biology Test
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1
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A group of eagles living around Lake Tahoe would be considered a
population
2
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Fish, their predators, and the water, sunlight, and plants that they rely on would be considered an
ecosystem
3
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Which of the following is NOT a characteristic of a living thing
moves around
4
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A field of sunflowers facing towards the sun is an example of
response to stimuli
5
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If an organism divides and produces an exact copy of itself, the organism
has reproduces asexually
6
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What is one biotic factor that affects the size of a population in an ecosystem
the number of predators present
7
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Organisms such as plants or phytoplankton that carry out photosynthesis, would cause a decrease of which gas in the atmosphere
Carbon dioxide
8
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In the carbon cycle, decomposers return carbon to the soil. Which of the following is NOT something that decomposers can break down
Carbon dioxide found in the air
9
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Humans increase carbon dioxide in the atmosphere, and contribute to the carbon to the carbon cycle by
combustion from driving cars
10
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Nitrogen in the air must be “fixed” before it can be used by plants. Atmospheric nitrogen is “fixed” by
bacteria
11
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When deforestation (cutting down trees) occurs in an area, what immediate effect does this have on the water cycle?
less is returned to the air by transpiration
12
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The main result of photosynthesis is
CO2 is removed and captured by plants.
13
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Bacteria are involved in many steps of the biochemical cycles. Which of the following steps in bacteria is NOT involved
Transpiration
14
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Which of the following is common to the carbon cycle, the nitrogen cycle, and the water cycle?
These substances are required by all living things and are involved in many processes that occur in all living things.
15
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Water can be returned to the atmosphere through the leaves of plants by
transpiration
16
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For the carbon cycle and the nitrogen cycle to function properly, which organisms must always be present
Decomposers
17
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evaporation
rising from lake
18
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infiltration
absorbed underground
19
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condensation
forming clouds
20
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transpiration
rising from trees
21
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precipitation
falling from the sky
22
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run-off
moving down incline
23
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Denifriciation
Name the process of returning nitrogen to the atmosphere
24
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In what two ways can animals contribute nitrogen back into the soil
feces, when the animal dies
25
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What would happen to the nitrogen cycle is decomposers were not present
no nitrogen would be put into the soil by dead animals
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