Review Questions
Write your answer, and nothing else, on the
white board.
Work together with people around you.
Hold up your answer, but don’t say it too
loudly.
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In a forest ecosystem, the following
factors are present. Sort these into
biotic versus abiotic:
Soil
Trees
Squirrels
Sunlight
Rainfall
Temperature
Birds
Mushrooms
Insects
rocks
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In a aquatic ecosystem, the following
factors are present. Sort these into
biotic versus abiotic:
Water
Fish
dissolved salt
dissolved oxygen
Algae
Bacteria
pH of water
lobsters
Based on the food web above, name one
population that might increase if a disease
killed half of the hawk population.
•Squirrels or rabbits
Which of the following is true?
A) a community contains several ecosystems
B) an organism contains several communities
C) a community contains several populations
D) a population contains several communities
•C
Which trophic level in a food chain
contains the most energy?
A) producers
B) primary consumers
C) secondary consumers
D) tertiary consumers
•A) producers
This ecological pyramid
contains hawks, snakes, rats,
and plants. If 100 snakes are
present in an ecosystem,
how many rats are likely to
be present?
•1000 (10% rule)
Which organisms are the
secondary consumers in
this pyramid?
A) plants
B) rats
•C
C) snakes
D) hawks
Create an example of
a food chain based
on this ecological
pyramid.
•plants  rats  snakes  hawks
True or False
A poisonous substance
that accumulates in living
tissue is sprayed on the
plants. This substance will
accumulate more in rats
than in snakes.
•False
Which of the following is most likely
to be a decomposer?
A) a species of fungi
B) a species of insects
C) a species of trees
D) a species of birds
•A
Which of the following is an example of
primary ecological succession?
A) a forest fire kills a population of trees
B) a glacier melts, exposing bare rock
C) disease causes extinction of a bird species
D) removal of predators increases prey population
•B
Which of these shows the correct
definitions of the symbiotic relationship?
Relationship
Organism #1
Organism #2
A)
Parasitism
benefits
unaffected
B)
Commensalism
benefits
unaffected
C)
Parasitism
benefits
benefits
D)
Commensalism
harmed
benefits
•B
Which of these shows the correct
definitions of the symbiotic relationship?
Relationship
Organism #1
Organism #2
A)
Mutualism
benefits
unaffected
B)
Parasitism
benefits
unaffected
C)
Mutualism
benefits
benefits
D)
Parasitism
harmed
unaffected
•C
According to the food web, which population
might decrease in size if trout population was
reduced by human activity?
•bear or heron
If a large number of finches migrated into this
ecosystem, which population would initially
decrease?
•insects
Name an organism that is a primary
consumer in this food web.
•Rabbits, insects, or small fish