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BIS 2B Final Exam Questions and Correct
Answers/ Latest Update / Already Graded
Intraspecific
Ans: Interactions between members of the same species
(Individual Interactions).
Interspecific
Ans: Interactions between individuals from two different
species.
-Sources of selection (evolution)
-Determine distribution and abundance of species (ecology)
-Important in determining population regulation
Ans: Why should we study interspecific interactions?
Competition
Ans: Each species has a negative effect on the other.
(-,-)
Amensalism
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Ans: One species injured but the interaction, the other is
unaffected by the other species. (-,0)
Predation/Parasitism/Herbivory
Ans: One species benefits at the cost of another. (+, -)
Commensalism
Ans: One species benefits and the other is unaffected. (+,0)
-Often refers to mobile associates.
Facilitation
Ans: One species benefits and the other is unaffected. (+,0)
-Often refers to sessile associates
Mutualism
Ans: Both species benefit. (+,+)
-Have both costs and benefits, and the outcome is only
mutualistic when benefits outweigh costs for both species.
Obligate Mutualism
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Ans: Mutually beneficial interaction between two species in
which each species REQUIRES the other to persist.
ex: Yucca plant and Yucca Moth
Facultative Mutualism
Ans: Beneficial interaction between two species in which each
species benefits, but does not require the other to persist.
-More likely to be conditional.
Conditionality
Ans: When outcomes of species interactions depend on the
environment.
Satiation
Ans: Number of prey is so abundant that predators cannot
possibly eat them all.
-Underground networks to allow escape from larger predators
-Refuge at High Densities: Safety in Numbers; reduces efficiency of
predators
Ans: What are the different types of refuges?
All rights reserved © 2025/ 2026 |
BIS 2B Final Exam Questions and Correct
Answers/ Latest Update / Already Graded
Intraspecific
Ans: Interactions between members of the same species
(Individual Interactions).
Interspecific
Ans: Interactions between individuals from two different
species.
-Sources of selection (evolution)
-Determine distribution and abundance of species (ecology)
-Important in determining population regulation
Ans: Why should we study interspecific interactions?
Competition
Ans: Each species has a negative effect on the other.
(-,-)
Amensalism
All rights reserved © 2025/ 2026 |
, Page |2
Ans: One species injured but the interaction, the other is
unaffected by the other species. (-,0)
Predation/Parasitism/Herbivory
Ans: One species benefits at the cost of another. (+, -)
Commensalism
Ans: One species benefits and the other is unaffected. (+,0)
-Often refers to mobile associates.
Facilitation
Ans: One species benefits and the other is unaffected. (+,0)
-Often refers to sessile associates
Mutualism
Ans: Both species benefit. (+,+)
-Have both costs and benefits, and the outcome is only
mutualistic when benefits outweigh costs for both species.
Obligate Mutualism
All rights reserved © 2025/ 2026 |
, Page |3
Ans: Mutually beneficial interaction between two species in
which each species REQUIRES the other to persist.
ex: Yucca plant and Yucca Moth
Facultative Mutualism
Ans: Beneficial interaction between two species in which each
species benefits, but does not require the other to persist.
-More likely to be conditional.
Conditionality
Ans: When outcomes of species interactions depend on the
environment.
Satiation
Ans: Number of prey is so abundant that predators cannot
possibly eat them all.
-Underground networks to allow escape from larger predators
-Refuge at High Densities: Safety in Numbers; reduces efficiency of
predators
Ans: What are the different types of refuges?
All rights reserved © 2025/ 2026 |
