Biology 150 - Chapter 11 LEARN Quiz

Question 1

Question

A harmless fly develops colouration that makes it look like a poisonous wasp. This is an example of:

Image:

batesian_mimicry (image/jpg)

Answer

Mullerian mimicry
Batesian mimicry
competitive avoidance
character displacement

Question 2

Question

Which of the following interspecific interaction is NOT +/–?

Answer

competition
predation
herbivory
parasitism

Question 3

Question

Allopatric species that use similar resources are likely to display character displacement.

Answer

True
False

Question 4

Question

Which of the following is the BEST example of a biological COMMUNITY?

Answer

black bears in British Columbia and Ontario

Image:
black-bears (image/jpg)
polar bears, seals and fish in Western Hudson Bay

Image:
polar-bears (image/jpg)
a group of zebra mussels in a lake

Image:
zebra-mussels (image/jpg)
none of the above

Question 5

Question

A prey species starts producing a toxin in its skin after exposure to a predator. The toxin was not present until the predator arrives. This is an example of:

Answer

a constitutive defence
a standing defence
aposematic colouration
an inducible defence

Question 6

Question

Three species of poisonous frogs have very similar colouration. This is an example of:

Image:

mullerian_mimicry (image/jpg)

Answer

Batesian mimicry
Mullerian mimicry
predator avoidance
colouration mimicry

Question 7

Question

When two species compete, which of the following is a possible outcome?

Answer

competitive exclusion of one species
niche differentiation
character displacement
all of the above

Question 8

Question

Competitive exclusion often results from symmetric competition.

Answer

True
False

Question 9

Question

Why don't herbivores eat all of the primary production on Earth?

Image:

herbivore (image/jpg)

Answer

herbivore populations are limited to available nitrogen
some plant tissues are toxic
herbivore populations are limited by predators
all of the above

Question 10

Question

Interspecific interaction between species (ie. parasitism, mutualism, competition) are constant. Once established, they do not change.

Answer

True
False

Question 11

Question

Dominance by a few species is more likely in a less diverse community.

Answer

True
False

Question 12

Question

All communities have dominant species.

Answer

True
False

Question 13

Question

Species diversity has two components: 1) species richness; 2) relative abundance/evenness.

Answer

True
False

Question 14

Question

Which community is most diverse? HINT: Read ‘25A’ as “25 individuals of Species A” and ‘25B’ as “25 individuals of Species B”, etc.

Answer

community 4: 25A, 25B, 25C
community 3: 25A, 20B, 50C, 5D
community 1: 25A, 25B, 25C, 25D
community 2: 20A, 20B, 20C, 20D, 20E

Question 15

Question

Which one of these curves is representative of the most diverse community?

Image:

diverse_community (image/jpg)

Answer

Potash Brook
Snipe Island Brook
Centennial Brook
all are the same

Question 16

Question

Data on an individual species’ frequency, density, basal area and biomass could be used to calculate what quantity?

Answer

importance
Simpson's Index
richness
evenness

Question 17

Question

Which of the following statements about diversity indices is FALSE?

Answer

they incorporate data on both number of species and evenness of species
the Shannon Index gives more weight to rare species
evenness varies between 0 and 1
they do not account for dominant species

Question 18

Question

Keystone species influence community structure because they are always abundant.

Answer

True
False

Question 19

Question

If the presence of a keystone predator increases diversity, it is likely preying on:

Answer

bioengineers
superior competitors
tolerant competitors
inferior competitors

Question 20

Question

Keystone species can affect their communities by:

Answer

affecting inter-species interaction
modifying habitat
affecting inter-community interactions
all of the above

Question 21

Question

In a three-step food chain subject to top-down control, you have fish that eat zooplankton that eat algae. What is likely to happen if the fish are removed?

Answer

algae abundance increases
zooplankton abundance decreases
algae abundance decreases
all of the above

Question 22

Question

You add fertilizer to an experimental plot. Plant growth increases, and you observe that the number of herbivores and carnivores increases. This is an example of:

Answer

bottom-up control
top-down control
the energetic hypothesis
omnivory

Question 23

Question

Several species of fish in a lake eat plankton. This group can be referred to as:

Image:

many-species-of-fish (image/jpg)

Answer

omnivores
a cohort
a guild
a feeding group

Question 24

Question

A species is fished out of a lake, and another species fills its niche and role in the food web. This is an example of:

Image:

fishing (image/jpg)

Answer

bottom-up control
functional redundancy
top-down control
facultative redundancy

Question 25

Question

Understanding how the decline of sea otters affected kelp forests in the Pacific leads us to conclude that:

Image:

otters_holding_hands_-_medium (image/jpg)

Answer

sea otters are subject to density-independent factors
sea otters are bioengineers
sea otters are keystone prey
sea otters are keystone predators

Question 26

Question

If the intermediate disturbance hypothesis is true, communities that experience intermediate disturbance levels have:

Answer

shorter food chains
higher species diversity
more competitive exclusion
no slow-colonizing species

Question 27

Question

An early colonizing plant species modifies the soil environment such that larger vascular plants can colonize. This is an example of:

Answer

negative allelopathy
facilitation
tolerance
inhibition

Question 28

Question

In which of the following is competition used to explain successional patterns?

Answer

inhibition
tolerance
facilitation
both A and B

Question 29

Question

If the initial floristic composition hypothesis is true, we would expect community succession to:

Answer

end in a predictable, stable climax community
not depend on competition
be affected by which species arrive first
all of the above

Question 30

Question

In succession, species diversity always increases over time.

Image:

succession.gif (image/gif)

Answer

True
False

Question 31

Question

Which of the following statements about the resource-ratio hypothesis is TRUE:

Answer

species that grow quickly are favoured throughout succession
availability of nutrients decreases over time
availability of light decreases over time
competition does not affect successional outcomes

Question 32

Question

A farmer cuts down part of a forest to make a field. The abrupt border between the forest and field is BEST characterized as:

Image:

cutting-down-forests.JPG (image/JPG)

Answer

an ecotone
a core area
an induced edge
an inherent edge

Question 33

Question

A farmer cuts down part of a forest to make a field, but plants species diversity remains constant for almost 10 years before deciding. This is BEST characterized as an example of:

Answer

matrix effects
a border effect
the relaxation effect
area-intensive species

Question 34

Question

Two species cannot coexist permanently in a community if their niches are identical.

Answer

True
False

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Biology 150 - Chapter 11 LEARN Quiz

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Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Question 10

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20

Question 21

Question 22

Question 23

Question 24

Question 25

Question 26

Question 27

Question 28

Question 29

Question 30

Question 31

Question 32

Question 33

Question 34

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	Created by Laurel McLaughlin about 10 years ago