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Interactions Succession and
other topics
Populations
Humans and
the
environment
Grab bag
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Category 1 for 1
Question: Two hyenas fight
over a zebra carcass. This is an
example of __ __.
Check Your Answer
Category 1 for 1
Answer: intraspecific
competition.
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Daily Double for 4
Question: What are the 3
forms of symbiosis? Give an
example of each.
Check Your Answer
Daily Double for 4
Answer: Mutualism = beneficial bacteria in
intestines
Parasitism = a tick on an animal
Commensalism = a hawk sitting on a
tortoise’s back
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Category 1 for 3
Question: Name the 6 major
interactions we discussed, and give
the signs for each. (+, -, 0)
Check Your Answer
Category 1 for 3
Answer: parasitism +/predation +/competition -/-
commensalism +/0
mutualism +/+
amensalism -/0
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Category 1 for 4
Question:
What is
happening in
this
experiment?
Check Your Answer
Category 1 for 4
Answer:
competitive
exclusion
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Category 1 for 5
a) What is
happening in
this picture?
b) Which type
of niche is
shown?
Check Your Answer
Category 1 for 5
a) niche
partitioning
b) realized
niche
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Category 2 for 1
Question: How could global
warming increase agricultural
productivity?
Check Your Answer
Category 2 for 1
Answer: warmer global
temperatures could mean
longer growing seasons for
crops
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Category 2 for 2
Question: Describe two examples
of secondary succession.
Check Your Answer
Category 2 for 2
Answer: after a hurricane destroys
an ecosystem, after a forest fire,
when a person neglects their lawn
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Daily Double for 6
A coyote was dozing in the shade of an oak
tree, contented after eating a squirrel.
Several burr seeds were stuck in his coat.
A large branch had fallen from the tree and
crushed several small oak seedlings
growing underneath it. Robins picked
caterpillars from the oak leaves.
Describe 6 different interactions in the
paragraph.
Check Your Answer
Daily Double for 6
Answer: (a) Predation: coyote and squirrel
(b) Commensalism: coyote and oak
(c) Commensalism: coyote and burr seeds
(d) Amensalism: oak and seedlings
(e) Intraspecific competition: oak and
seedlings
(f) Mutualism: robin and oak
(g) Predation: robin and caterpillars
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Category 2 for 4
Give an example of
behavioral parasitism.
Check Your Answer
Category 2 for 4
Answer: The cowbird parasitizing
songbird nests by laying eggs in
them. (brood parasitism)
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Category 2 for 5
Question: Give 2 examples of
primary succession. What is the
name for the first organisms to live
in an ecosystem? Name 2 of these.
Check Your Answer
Category 2 for 5
Answer: when a glacier recedes, on
newly cooled lava. Pioneer species,
such as lichens or mosses, are the
first to grow in an area.
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Category 3 for 1
Which are populations?
(a) All the animals in a zoo
(b) All the fish in a pond
(c) All the mosquitoes around a lake
(d) Both b and c
(e) a, b, and c
Check Your Answer
Category 3 for 1
Answer: (c) all of the
mosquitoes around a lake
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Category 3 for 2
Question: Name the three types
of population dispersal.
Check Your Answer
Category 3 for 2
Answer: random, clumped, uniform
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Daily Double for 6!
A population of wolves averages 25
births and 10 deaths a year. If 3
wolves are immigrants, and overall
growth is 12 wolves, how many
emigrate?
Check Your Answer
Category 3 for 6
Answer: Growth = (births + immigrants) – (deaths +
emigrants)
12 = (25 + 3) – (10 + x)
12 = 28 - (10 + x)
10 + x = 28 -12
10 + x = 16
x=6
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Category 3 for 4
Question: Give
an example of a
type I, II, and III
organism. (Do
not use squirrel,
human, or oak)
Check Your Answer
Category 3 for 4
Answer: I = elephant
II = bird
III = frog
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Category 3 for 5
Q: In a 100 m2 field, there are
25 chipmunks. What is the
population density?
Check Your Answer
Category 3 for 5
25 chipmunks/100m2 =
0.25
2
chipmunks/m
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Category 4 for 1
Q: Name 3
greenhouse gases.
(from class or the
textbook)
Check Your Answer
Category 4 for 1
Answer: carbon dioxide,
water vapor, methane
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Category 4 for 2
Question: Name 2 chemicals
that can undergo
biomagnification.
Check Your Answer
Category 4 for 2
Answer: DDT, mercury, PCBs
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Category 4 for 3
Question: Name 3 introduced
species from the text or class
discussion. Also name the
location where each species was
introduced.
Check Your Answer
Category 4 for 3
Answer: kudzu in the South, rabbits in
Australia, mice in China, Python in Everglades
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Category 4 for 4
Question: What acids are found
in acid rain? (besides carbonic
acid which is normally in rain)
Check Your Answer
Category 4 for 4
Answer: Sulfuric acid forms from sulfur
dioxide released from burning of coal.
Nitric acid forms from nitrous oxide from
burning of gasoline.
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Category 4 for 5
Question: What is an indicator species?
Name 3 of 4 indicator species that were
described in the textbook or in class.
Check Your Answer
Category 4 for 5
Answer: gender-bending fish,
amphibians such as frogs, bird
known as Forster’s tern, beluga
whale,
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Daily Double for 2
Question: What are two
nonrenewable resources?
Check Your Answer
Daily Double for 2
Answer: coal and oil.
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Category 5 for 2
Question: Earthworms aerate the soil by
tunneling through it. They also enrich soil
by adding their waste. They are efficient
decomposers. This best describes the
earthworm’s:
(a) Habitat
(b) Niche
(c) Footprint
(d) Limiting factors
Check Your Answer
Category 5 for 2
Answer: (b) niche
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Category 5 for 3
Question: The horned
lizard of North American
deserts and the thorny
devil of Australian deserts
occupy a similar niche.
These organisms would be
known as __________
________.
Check Your Answer
Category 5 for 3
Answer: ecological equivalents
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Category 5 for 4
Question: You watch a television
program that states that organisms
must always struggle with one
another for existence. Do you
agree? Explain why or why not.
Check Your Answer
Category 5 for 4
Answer: No. Mutualism and
commensalism are examples of
interactions that aren’t a struggle
between organisms.
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Category 5 for 5
Question: A hypothetical strain of bacteria
doubles every two minutes. One single
bacterium was put in a sealed bottle at 8:00
a.m., and the bottle was filled at exactly
10:00 a.m.
What time was the bottle half full?
Check Your Answer
Category 5 for 5
Answer: 9:58 a.m.
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