Quiz
Biology 150 - Chapter 11 LEARN Quiz
Questions in this quiz (34)
1A harmless fly develops colouration that makes it look like a poisonous wasp. This is an example of:
- AMullerian mimicry
- BBatesian mimicry
- Ccompetitive avoidance
- Dcharacter displacement
2Which of the following interspecific interaction is NOT +/–?
- Acompetition
- Bpredation
- Cherbivory
- Dparasitism
3Allopatric species that use similar resources are likely to display character displacement.
- ATrue
- BFalse
4Which of the following is the BEST example of a biological COMMUNITY?
- Ablack bears in British Columbia and Ontario
- Bpolar bears, seals and fish in Western Hudson Bay
- Ca group of zebra mussels in a lake
- Dnone of the above
- Ablack bears in British Columbia and Ontario
5A 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:
- Aa constitutive defence
- Ba standing defence
- Caposematic colouration
- Dan inducible defence
6Three species of poisonous frogs have very similar colouration. This is an example of:
- ABatesian mimicry
- BMullerian mimicry
- Cpredator avoidance
- Dcolouration mimicry
7When two species compete, which of the following is a possible outcome?
- Acompetitive exclusion of one species
- Bniche differentiation
- Ccharacter displacement
- Dall of the above
8Competitive exclusion often results from symmetric competition.
- ATrue
- BFalse
9Why don't herbivores eat all of the primary production on Earth?
- Aherbivore populations are limited to available nitrogen
- Bsome plant tissues are toxic
- Cherbivore populations are limited by predators
- Dall of the above
10Interspecific interaction between species (ie. parasitism, mutualism, competition) are constant. Once established, they do not change.
- ATrue
- BFalse
11Dominance by a few species is more likely in a less diverse community.
- ATrue
- BFalse
12All communities have dominant species.
- ATrue
- BFalse
13Species diversity has two components: 1) species richness; 2) relative abundance/evenness.
- ATrue
- BFalse
14Which community is most diverse? HINT: Read ‘25A’ as “25 individuals of Species A” and ‘25B’ as “25 individuals of Species B”, etc.
- Acommunity 4: 25A, 25B, 25C
- Bcommunity 3: 25A, 20B, 50C, 5D
- Ccommunity 1: 25A, 25B, 25C, 25D
- Dcommunity 2: 20A, 20B, 20C, 20D, 20E
15Which one of these curves is representative of the most diverse community?
- APotash Brook
- BSnipe Island Brook
- CCentennial Brook
- Dall are the same
16Data on an individual species’ frequency, density, basal area and biomass could be used to calculate what quantity?
- Aimportance
- BSimpson's Index
- Crichness
- Devenness
17Which of the following statements about diversity indices is FALSE?
- Athey incorporate data on both number of species and evenness of species
- Bthe Shannon Index gives more weight to rare species
- Cevenness varies between 0 and 1
- Dthey do not account for dominant species
18Keystone species influence community structure because they are always abundant.
- ATrue
- BFalse
19If the presence of a keystone predator increases diversity, it is likely preying on:
- Abioengineers
- Bsuperior competitors
- Ctolerant competitors
- Dinferior competitors
20Keystone species can affect their communities by:
- Aaffecting inter-species interaction
- Bmodifying habitat
- Caffecting inter-community interactions
- Dall of the above
21In 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?
- Aalgae abundance increases
- Bzooplankton abundance decreases
- Calgae abundance decreases
- Dall of the above
22You 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:
- Abottom-up control
- Btop-down control
- Cthe energetic hypothesis
- Domnivory
23Several species of fish in a lake eat plankton. This group can be referred to as:
- Aomnivores
- Ba cohort
- Ca guild
- Da feeding group
24A species is fished out of a lake, and another species fills its niche and role in the food web. This is an example of:
- Abottom-up control
- Bfunctional redundancy
- Ctop-down control
- Dfacultative redundancy
25Understanding how the decline of sea otters affected kelp forests in the Pacific leads us to conclude that:
- Asea otters are subject to density-independent factors
- Bsea otters are bioengineers
- Csea otters are keystone prey
- Dsea otters are keystone predators
26If the intermediate disturbance hypothesis is true, communities that experience intermediate disturbance levels have:
- Ashorter food chains
- Bhigher species diversity
- Cmore competitive exclusion
- Dno slow-colonizing species
27An early colonizing plant species modifies the soil environment such that larger vascular plants can colonize. This is an example of:
- Anegative allelopathy
- Bfacilitation
- Ctolerance
- Dinhibition
28In which of the following is competition used to explain successional patterns?
- Ainhibition
- Btolerance
- Cfacilitation
- Dboth A and B
29If the initial floristic composition hypothesis is true, we would expect community succession to:
- Aend in a predictable, stable climax community
- Bnot depend on competition
- Cbe affected by which species arrive first
- Dall of the above
30In succession, species diversity always increases over time.
- ATrue
- BFalse
31Which of the following statements about the resource-ratio hypothesis is TRUE:
- Aspecies that grow quickly are favoured throughout succession
- Bavailability of nutrients decreases over time
- Cavailability of light decreases over time
- Dcompetition does not affect successional outcomes
32A farmer cuts down part of a forest to make a field. The abrupt border between the forest and field is BEST characterized as:
- Aan ecotone
- Ba core area
- Can induced edge
- Dan inherent edge
33A 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:
- Amatrix effects
- Ba border effect
- Cthe relaxation effect
- Darea-intensive species
34Two species cannot coexist permanently in a community if their niches are identical.
- ATrue
- BFalse
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- Biology 150 (Organismal and Evolutionary Ecology), Chapter 11 (Community Ecology) LEARN Quiz
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- Laurel McLaughlin
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- English
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