1559786
Beschreibung
Quiz von Laurel McLaughlin, aktualisiert more than 1 year ago
|
Erstellt von Laurel McLaughlin
vor fast 10 Jahre
|
|
Frage 1
Frage
A harmless fly develops colouration that makes it look like a poisonous wasp. This is an example of:
Image:
batesian_mimicry (image/jpg)
Antworten
-
Mullerian mimicry
-
Batesian mimicry
-
competitive avoidance
-
character displacement
Frage 2
Frage
Which of the following interspecific interaction is NOT +/–?
Antworten
-
competition
-
predation
-
herbivory
-
parasitism
Frage 3
Frage
Allopatric species that use similar resources are likely to display character displacement.
Antworten
- True
- False
Frage 4
Frage
Which of the following is the BEST example of a biological COMMUNITY?
Antworten
-
black bears in British Columbia and OntarioImage:black-bears (image/jpg)
-
polar bears, seals and fish in Western Hudson BayImage:polar-bears (image/jpg)
-
a group of zebra mussels in a lakeImage:zebra-mussels (image/jpg)
-
none of the above
Frage 5
Frage
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:
Antworten
-
a constitutive defence
-
a standing defence
-
aposematic colouration
-
an inducible defence
Frage 6
Frage
Three species of poisonous frogs have very similar colouration. This is an example of:
Antworten
-
Batesian mimicry
-
Mullerian mimicry
-
predator avoidance
-
colouration mimicry
Frage 7
Frage
When two species compete, which of the following is a possible outcome?
Antworten
-
competitive exclusion of one species
-
niche differentiation
-
character displacement
-
all of the above
Frage 8
Frage
Competitive exclusion often results from symmetric competition.
Antworten
- True
- False
Frage 9
Antworten
-
herbivore populations are limited to available nitrogen
-
some plant tissues are toxic
-
herbivore populations are limited by predators
-
all of the above
Frage 10
Frage
Interspecific interaction between species (ie. parasitism, mutualism, competition) are constant. Once established, they do not change.
Antworten
- True
- False
Frage 11
Frage
Dominance by a few species is more likely in a less diverse community.
Antworten
- True
- False
Frage 12
Frage
All communities have dominant species.
Antworten
- True
- False
Frage 13
Frage
Species diversity has two components: 1) species richness; 2) relative abundance/evenness.
Antworten
- True
- False
Frage 14
Frage
Which community is most diverse? HINT: Read ‘25A’ as “25 individuals of Species A” and ‘25B’ as “25 individuals of Species B”, etc.
Antworten
-
community 4: 25A, 25B, 25C
-
community 3: 25A, 20B, 50C, 5D
-
community 1: 25A, 25B, 25C, 25D
-
community 2: 20A, 20B, 20C, 20D, 20E
Frage 15
Frage
Which one of these curves is representative of the most diverse community?
Antworten
-
Potash Brook
-
Snipe Island Brook
-
Centennial Brook
-
all are the same
Frage 16
Frage
Data on an individual species’ frequency, density, basal area and biomass could be used to calculate what quantity?
Antworten
-
importance
-
Simpson's Index
-
richness
-
evenness
Frage 17
Frage
Which of the following statements about diversity indices is FALSE?
Antworten
-
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
Frage 18
Frage
Keystone species influence community structure because they are always abundant.
Antworten
- True
- False
Frage 19
Frage
If the presence of a keystone predator increases diversity, it is likely preying on:
Antworten
-
bioengineers
-
superior competitors
-
tolerant competitors
-
inferior competitors
Frage 20
Frage
Keystone species can affect their communities by:
Antworten
-
affecting inter-species interaction
-
modifying habitat
-
affecting inter-community interactions
-
all of the above
Frage 21
Frage
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?
Antworten
-
algae abundance increases
-
zooplankton abundance decreases
-
algae abundance decreases
-
all of the above
Frage 22
Frage
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:
Antworten
-
bottom-up control
-
top-down control
-
the energetic hypothesis
-
omnivory
Frage 23
Frage
Several species of fish in a lake eat plankton. This group can be referred to as:
Antworten
-
omnivores
-
a cohort
-
a guild
-
a feeding group
Frage 24
Frage
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)
Antworten
-
bottom-up control
-
functional redundancy
-
top-down control
-
facultative redundancy
Frage 25
Frage
Understanding how the decline of sea otters affected kelp forests in the Pacific leads us to conclude that:
Antworten
-
sea otters are subject to density-independent factors
-
sea otters are bioengineers
-
sea otters are keystone prey
-
sea otters are keystone predators
Frage 26
Frage
If the intermediate disturbance hypothesis is true, communities that experience intermediate disturbance levels have:
Antworten
-
shorter food chains
-
higher species diversity
-
more competitive exclusion
-
no slow-colonizing species
Frage 27
Frage
An early colonizing plant species modifies the soil environment such that larger vascular plants can colonize. This is an example of:
Antworten
-
negative allelopathy
-
facilitation
-
tolerance
-
inhibition
Frage 28
Frage
In which of the following is competition used to explain successional patterns?
Antworten
-
inhibition
-
tolerance
-
facilitation
-
both A and B
Frage 29
Frage
If the initial floristic composition hypothesis is true, we would expect community succession to:
Antworten
-
end in a predictable, stable climax community
-
not depend on competition
-
be affected by which species arrive first
-
all of the above
Frage 30
Frage
In succession, species diversity always increases over time.
Image:
succession.gif (image/gif)
Antworten
- True
- False
Frage 31
Frage
Which of the following statements about the resource-ratio hypothesis is TRUE:
Antworten
-
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
Frage 32
Frage
A farmer cuts down part of a forest to make a field. The abrupt border between the forest and field is BEST characterized as:
Antworten
-
an ecotone
-
a core area
-
an induced edge
-
an inherent edge
Frage 33
Frage
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:
Antworten
-
matrix effects
-
a border effect
-
the relaxation effect
-
area-intensive species
Frage 34
Frage
Two species cannot coexist permanently in a community if their niches are identical.
Antworten
- True
- False
Möchten Sie mit GoConqr kostenlos Ihre eigenen Quiz erstellen? eigenen Mehr erfahren.