Trophic Levels and Food Webs Answers

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1
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A quaternary consumer species would be expected to have a smaller population than a secondary consumer species.

A
T
B
F
2
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In a trophic pyramid, which of the following populations would be found in the trophic level directly above the producers?

A
hawks
B
rabbits
C
snakes
D
trees
3

Organisms produce their own energy or provide energy for other organisms in a food chain. Yellowfin tuna, or Thunnus albacores, are large sport fish found in tropical and subtropical waters around the world. They typically school under objects such as boats or patches of driftwood for protection from predators. Schooling under these structures also provides yellowfin tuna with easy access to smaller fish that may be foraging for food. Photo by NOAA Which trophic level does yellowfin tuna fill in a food chain?

Question illustration
A
producer
B
primary consumer
C
secondary consumer
D
tertiary consumer
4

All animals are _______.

A
producers
B
omnivores
C
herbivores
D
consumers
5

Which of the following would not reduce the carrying capacity of an ecosystem for a particular prey species?

A
drought
B
fewer primary producers
C
habitat destruction
D
fewer predators
6

Which is not an advantage of using the Pyramid of Energy?

A
It takes into account the rate of production over a period of time.
B
Assigning the decomposers and detritivores to a particular trophic level.
C
There are no inverted pyramids.
D
The input of solar energy can be added.
7

The initial period of population growth for a species in an environment is _______.

A
linear
B
exponential
C
slow
D
negative
8

Which of the following has the most biomass?

A
quaternary consumers
B
secondary consumers
C
primary consumers
D
producers
9

The elimination of a predator has no negative impacts on that predator’s prey species.

A
T
B
F
10

The main producers in aquatic environments are _______.

A
phytoplankton
B
zooplankton
C
kelp
D
fish

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