Biology (Raven), 9th Edition

Chapter 58: Dynamics of Ecosystems

Pre-Test

1
Burning of fossil fuels has created an imbalance in which cycle?
A)Water
B)Nitrogen
C)Carbon
D)Phosphorus
E)Sodium
2
Energy passes from organism to organism, each level is termed a(n)
A)carbon cycle.
B)nitrogen cycle.
C)energy flow.
D)trophic level.
E)energy level.
3
An increase in species in lover trophic levels may be due to:
A)removal of carnivores.
B)bottom up effects.
C)removal of herbivores.
D)decrease in producers.
E)all of these may cause an increase.
4
The Cedar Creek studies indicate that higher species richness results in
A)less year-to-year variation in biomass.
B)greater resistance to drought.
C)greater resistance to non-native species.
D)all of these are possible outcomes.
E)none of these apply.
5
The _____ model proposes that extinction and colonization reach a balance point.
A)extinction-balance
B)colonization-balance
C)extinction/colonization-balance
D)island
E)equilibrium
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