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Study Quiz 2.1: Food Chains, Food Webs, and Energy Flow
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There would be no life in the oceans without organisms called ______ and ______.
A)decomposers, phytoplankton
B)zooplankton, consumers
C)phytoplankton, zooplankton
D)zooplankton, scavengers
One model that shows how energy passes from organism to organism is called
A)an energy link
B)a food chain
C)a phytoplankton cycle
Which of the following two organisms are producers?
A)plants and phytoplankton
B)plants and consumers
C)consumers and phytoplankton
D)phytoplankton and chlorophyll
Producers make food using ______ to trap the Sun's energy in a process called photosynthesis.
A)food chains
C)cellular respiration
D)microscopic organisms
The process shown in this diagram is

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A)waste elimination
B)cellular respiration
C)a food chain
A food web is more realistic than a food chain for showing the feeding relationships in ecosystems because
A)it compares the number of consumers to the number of micro-organisms in an ecosystem
B)food chains use only a small sampling of organisms.
C)a food web explains why there are more producers than consumers.
D)producers are usually eaten by many different consumers and most consumers are eaten by more than one predator
To show how many organisms are at each level of a food chain, ecologists use a model called
A)an energy flow pyramid
B)a pyramid of numbers
C)a pyramid of energy
D)a food chain/food web pyramid
A pyramid of numbers shows that in an ecosystem
A)there are always a large number of producers at the bottom and fewer top consumers
B)there are always a large number of top consumers and fewer producers
C)there are an equal number of producers and consumers
D)there are more top consumers than primary consumers
What do ecologists call the transfer of energy that begins with the Sun and passes from one organism to the next in a food chain?
A)a food web
B)a top consumer
C)energy flow
D)a pyramid of numbers
Only a small amount of the energy stored in food is available to the next organism in a food chain because
A)there are more producers than consumers in a food chain
B)there are fewer top consumers than producers in a food chain
C)primary and secondary consumers compete for food
D)most of the energy is used for life processes

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