PCB3043 Exam Questions and Answers
Graded A+
commensalism - Correct answer-An interaction where one species benefits and the
other is unnafected (feeder, shelter, transportation, habitat, and dispersal)
mutualism - Correct answer-A direct or indirect species interaction where both
species benefit
allelopathy - Correct answer-a phenomenon when an organism produce
biochemicals that affect the growth, survival, and reproduction of other organisms
integrated pest management - Correct answer-an intergrated approach of crop
management to solve ecological problems when applied in agriculture; main goal
is to reduce or eliminate the use of pesticides while managing pest populations
community - Correct answer-"An assemblage of populations of living organisms is
a prescribed area or habitat that interact with one another, directly, or indirectly"
ecosystem - Correct answer-all the organisms living in a particular area, as well as
all the nonliving, physical compounds of the environment with which the
organisms interact, including air, soil, water, and sunlight
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, association - Correct answer-group of species living in the same place
guild - Correct answer-species in the same community using resources in the same
way, often competitors
phytosociology - Correct answer-the study of the composition and structure of
plant communities
diversity - Correct answer-Species evenness is high, or species richness (number of
species in a community) is high
alpha diversity - Correct answer-with-in habitat diversity, number of species in
local small areas of uniform habitat
beta diversity - Correct answer-between habitat diversity, the variation in species
composition from one habitat to another within a region
gamma diversity - Correct answer-regional diversity, number of species in a larger
area of interest across habitats or local areas
indirect mutualism - Correct answer-Occur when more than two species interact
such that one benefits another by way of its impact on a third species
facilitation - Correct answer-occurs when one species changes the environment to
be more suitable for a second species; an indirect form of commensalism
richness - Correct answer-the number of species in a community
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Graded A+
commensalism - Correct answer-An interaction where one species benefits and the
other is unnafected (feeder, shelter, transportation, habitat, and dispersal)
mutualism - Correct answer-A direct or indirect species interaction where both
species benefit
allelopathy - Correct answer-a phenomenon when an organism produce
biochemicals that affect the growth, survival, and reproduction of other organisms
integrated pest management - Correct answer-an intergrated approach of crop
management to solve ecological problems when applied in agriculture; main goal
is to reduce or eliminate the use of pesticides while managing pest populations
community - Correct answer-"An assemblage of populations of living organisms is
a prescribed area or habitat that interact with one another, directly, or indirectly"
ecosystem - Correct answer-all the organisms living in a particular area, as well as
all the nonliving, physical compounds of the environment with which the
organisms interact, including air, soil, water, and sunlight
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, association - Correct answer-group of species living in the same place
guild - Correct answer-species in the same community using resources in the same
way, often competitors
phytosociology - Correct answer-the study of the composition and structure of
plant communities
diversity - Correct answer-Species evenness is high, or species richness (number of
species in a community) is high
alpha diversity - Correct answer-with-in habitat diversity, number of species in
local small areas of uniform habitat
beta diversity - Correct answer-between habitat diversity, the variation in species
composition from one habitat to another within a region
gamma diversity - Correct answer-regional diversity, number of species in a larger
area of interest across habitats or local areas
indirect mutualism - Correct answer-Occur when more than two species interact
such that one benefits another by way of its impact on a third species
facilitation - Correct answer-occurs when one species changes the environment to
be more suitable for a second species; an indirect form of commensalism
richness - Correct answer-the number of species in a community
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
