A) approximately 100 plants
B) approximately 10 plants
C) approximately 50 plants
D) approximately 3 plants
E) approximately 1000 plants
G) B) and E)
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A) such animals do not tolerate other members like them.
B) through natural selection,most fierce animals have been killed off by others.
C) food chains are only 10 to 20% efficient at each step,and top carnivores are therefore limited by the availability of food in their range.
D) only a few such animals are permitted by succession in a biome,and there are only a few biomes.
F) C) and D)
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B) False
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A) omnivore - eats both producers and consumers
B) herbivore - eats producers and performs photosynthesis
C) detritivore - feeds on decomposing organic matter
D) autotroph - performs photosynthesis or chemosynthesis
E) carnivore - feeds on other consumers
G) A) and D)
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A) autotrophs - chemosynthesis
B) herbivores - algae
C) detritivores - inorganic matter
D) carnivores - other animals
F) None of the above
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A) Because this is a true cycle,it is impossible to run out of fresh water for human use.
B) All water molecules that evaporate from the ocean precipitate on land and move by gravity through groundwater to the ocean again.
C) Some water evaporates from land and from plants.
D) Once water sinks into the ground,it is safe from human exploitation or pollution until it has rejoined the ocean.
E) All of the choices are true.
G) A) and C)
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A) speciation
B) hypervolume
C) competitive exclusion
D) total extinction of one species
E) a switch in habitat for one of the organisms
G) B) and D)
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A) colonization by more K-selected species.
B) time for development of the soil.
C) more time for development of a seed bank.
D) colonization by organisms that are farther away.
E) redevelopment of the atmospheric gases.
G) A) and B)
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A) approximately 6
B) about 1/2 a rabbit
C) 2 whole rabbits
D) 12 rabbits
F) A) and C)
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A) an exception to the competitive exclusion principle.
B) an exception based on birds taking longer to eventually compete and eliminate competitors.
C) confirmation that all warblers were actually variations of the same species because different species couldn't coexist.
D) an example of resource partitioning.
F) All of the above
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A) omnivores.
B) herbivores.
C) autotrophs.
D) detritivores.
E) carnivores.
G) All of the above
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A) climate.
B) soil conditions.
C) each successive community preparing the way for the next.
D) All of the choices are correct.
F) A) and B)
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B) False
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A) 1200 kg.
B) 120 kg.
C) 12000 kg.
D) 6000 kg.
E) 12 kg.
G) A) and C)
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A) primary consumers eat detritus.
B) primary consumers eat photosynthetic organisms.
C) secondary consumers eat detritus.
D) secondary consumers eat photosynthetic organisms.
E) all the consumers are primary consumers.
G) C) and E)
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