Ecology CRCT Practice
23. An energy pyramid containing autotrophs and
other organisms from a food chain is represented
below.
Carnivores would most likely be located in
(A) level I, only
(B) (B) level I and level II
(C) level III, only
(D) level II and level III
(C) level III, only
21. Many species of plants interact with harmless
underground fungi. The f ungi enable the plants
to absorb certain essential minerals and the
plants provide the fungi with carbohydrates and
other nutrients. This describes an interaction
between a
(A)parasite and its host
(B) scavenger and a decomposer
(C) predator and its prey
(D) producer and a consumer
(D) producer and a consumer
The diagram below represents a pyramid of energy
that includes both producers and consumers.
The greatest a mount of available energy is found at
level
(A) 1
(B) 2
(C) 3
(D) 4
(A) 1
30. When brown tree snakes wer e accidentally
introduced onto the island of Guam, they had
no natural predators . These snakes sought out
and ate many of the eggs of insect-eating bir ds.
What prob ably occurred following the
introduction of the brown tree s nakes?
(A)The bird population increased.
(C) The bird pop ulation began to seek a new food
source.
(B) The insect population increased.
(D) The insect population began to seek a new
food source.
(B) The insect population increased.
32. If the frogs feed on insect larvae, what is the
role of the frogs in this pond ecosystem?
(A)Herbivore
(B) parasite
(C) consumer
(D) host
C) consumer
9. What type of succession is most likely to happen
in the Figure?
a. secondary
c. teriary
b. climax
d. primary
a. secondary
The removal of nearly all the predators from an
ecosystem would most likely result in
(A)an increase in the number of carnivore species
(B) a decrease in the size of decomposers
(C) a decrease in new predators migrating into the
ecosystem
(D) an increase in the number of herbivores
(D) an increase in the number of
herbivores
How much energy would be available to the organisms in
level C?
(A) all of the energy in level A, plus the energy in level B
(B) all of the energy in level A, minus the energy in level B
(C) a percentage of the energy contained in level B
(D) a percentage of the energy synthesized in level B and
level D
(C) a percentage of the energy
contained in level B
Where in the Energy Pyramid below
would Producers be placed in?
A) A
B) B
C) C
D)D
A) A
3. What is the correct series of steps for the
movement of energy in a food chain?
a. producers consumers scavengers and
recyclers sun
b. sun consumers producers scavengers
and recyclers
c. sun producers scavengers and recyclers
consumers
d. sun producers consumers scavengers
and recyclers
Which of the examples below can BEST be
described as mutualism between animals?
a. a tapeworm lives in the intestine of a bird
and consumes the food that the bird has
eaten
b. mountain lions and wolves fight eachother
for the same deer
c. a bird eats parasites off of a rhinoceros
while the rhinoceros provides protection to
the bird
d. rats live in the garbage dump of a town
and rarely interact with people
c. a bird eats parasites off of a rhinoceros while
the rhinoceros provides protection to the bird
Which ocean organism is considered a
producer?
a.
b.
c.
d.
phytoplankton
zooplankton
small fish
whales
a. phytoplankton
5. Roberto feeds his pet iguana a mixture of salad
greens, carrots, squash, crickets, and worms as
part of his regular diet. What type of consumer is
the iguana?
a.
b.
c.
d.
herbivore
carnivore
omnivore
decomposer
c. omnivore
Organisms that absorb nutrients from dead
plants and animals are called —
a.
carnivores.
b.
decomposers.
c.
herbivores.
d.
producers.
b. decomposers.
25. The spotted turtle is common in fresh water. It
eats insects, tadpoles, dead fish, and tender
aquatic plants. Which of these best describes the
spotted turtle?
a. A herbivore
b. A carnivore
c. An omnivore
d. A decomposer
c. An omnivore
Which organism shown in the pyramid receives the
highest percentage of energy from the Sun?
a.fox b. grass
c. grasshoppers
d. birds
b. grass
Which population would directly
increase if the population of owls
decreased?
A. Mice
B. Rabbits
C. Frogs
D. Foxes
C. Frogs
Which of the following best describes an energy
pyramid?
A. Shows how energy is lost as you move up a
food chain.
B. Shows the effects of losing a top
predator in an ecosystem.
C. illustrates the many possible
interactions among organisms in an
ecosystem.
D. Shows the importance of decomposers
in an ecosystem.
A. Shows how energy is lost as you
move up a food chain.
How can food chains be misleading?
A) They show many possible pathways of energy
flow in an ecosystem
B) They only show one possible pathway of
energy flow in an ecosystem
C) They do not show the proper order of energy
flow in an ecosystem
D) They don’t include tertiary consumers
B) They only show one possible pathway
of energy flow in an ecosystem
Out of the following consumers, which
would most likely be found at the top
of a food chain?
A) Herbivores
B) Carnivores
C) Omnivores
D) Scavengers
D) Scavengers
At each successive feeding level in an
ecosystem, the amount of available energy
a. Increases
b. Decreases
c. Remains the same
D. Doubles
b. Decreases
3. The organisms growing on the
log in Figure 2-8 are ____?
a. autotrophs b. producers
c. decomposers d. carnivores
c. decomposers