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Unit 3 Review
Test Description: 8.L.3.1, 8.L.3.2, and 8.L.3.3
Instructions: Answer all questions to get your test result.
1) Which best explains the importance of nitrogen in the cycling of energy and matter?
A
Nitrogen increases the effectiveness of photosynthesis.
B
Nitrogen increases protein production in plants.
C
Nitrogen decreases protein production in plants.
D
Nitrogen decreases the effectiveness of photosynthesis.
2) If wolves prey on deer for food, what will most likely happen to the deer population if wolves are removed from an area where deer live?
A
The population of deer will become extinct.
B
The population of deer will increase.
C
The population of deer will decrease.
D
The population of deer will remain the same.
3) Where do plants get most of the energy they need to live and grow?
A
water
B
soil
C
sunlight
D
air
4) Kudzu vines grow by climbing and wrapping around trees. Trees covered by kudzu can die because they are starved of sunlight. What type of relationship exists between the trees and the kudzu growing on them?
A
competition
B
predator-prey
C
mutualism
D
parasitism
5) What happens to a population and to competition when there is a reduction of living space?
A
Competition strengthens while the population contracts.
B
Competition weakens and the population decreases.
C
The population expands and competition intensifies.
D
The population increases as competition decreases.
6) Which best determines the number of wolves that can live in an area?
A
the number of birds that live in the area
B
the number of trees in the area
C
the amount of snow in the area each year
D
the amount of food available in the area
7) Which of these organisms is a producer in a marine ecosystem?
A
algae
B
fish
C
gull
D
worm
8) Which best describes an abiotic limiting factor in a population?
A
animals
B
water
C
plants
D
food
9) Some plants have fungi that live intertwined in their roots. The fungi provide nutrients to the plants, while the plants’ roots provide a habitat for the fungi. Which relationship is demonstrated by this example?
A
parasitism
B
competition
C
mutualism
D
predator-prey
10) Which level of a food chain has the most energy?
A
consumers
B
producers
C
scavengers
D
decomposers
*select an answer for all questions
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