McMaster Bio 1M03 Exam
QUESTIONS AND VERIFIED
CORRECT ANSWERS
GRADED A+ LATEST 100%
GUARANTEED PASS
ectoparasites - CORRECT ANSWER-live on outside of host (like ticks)
parasitoid - CORRECT ANSWER-free-living as adult, but parasitic as larva, often kills host
parasitoidism - CORRECT ANSWER-when a parasitoid is free living adult but endoparasitic as a
larva, usually fatal
constitutive/standing defenses - CORRECT ANSWER-defenses that are always present
Batesian mimicry - CORRECT ANSWER-harmless/palatable species resembles a
dangerous/poisonous one
Mullerian mimicry - CORRECT ANSWER-mimicry in which two or more harmful species resemble
each other
,inducible defenses - CORRECT ANSWER-physical, chemical, or behavioral defensive traits that
are induced in the prey in response to the presence of a predator
how is consumption an agent of natural selection? - CORRECT ANSWER-it leads to a
coevolutionary arms race between predator and prey that drives evolutionary change
Four key attributes of community structure - CORRECT ANSWER-1) the total number of species
2) the sum of interactions among all species
3) the relative abundance of those species
4) the physical attributes of the community, which may include abiotic factors and biotic factors
food web - CORRECT ANSWER-overlapping food chains, summary of consumption interactions
in a community
bottom-up influences on community structure - CORRECT ANSWER-when abiotic factors
determine the abundance of primary producers (nutrients, sunlight, water etc.)
top-down influences on community structure - CORRECT ANSWER-when certain consumers
change the species diversity in a community
keystone species - CORRECT ANSWER-species with a greater influence on species diversity than
its abundance and total biomass suggest
example of top-down control - CORRECT ANSWER-when a consumer limits prey population
trophic cascade - CORRECT ANSWER-series of changes in abundance of species in a food web,
usually caused by the addition/removal of a key predator
, disturbance - CORRECT ANSWER-any strong, short-lived disruption to a community, changes the
distribution of living/non-living resources
examples of disturbances - CORRECT ANSWER-forest fires, windstorms, floods, fall of a large-
canopy tree, disease epidemics, short-term explosions in herbivore numbers
what do disturbances alter? - CORRECT ANSWER-light levels, nutrients, unoccupied space, and
other aspects of resource availabiliy
three factors contributing to the impact of a disturbance - CORRECT ANSWER-1. the type of
disturbance
2. its frequency
3. its severity
disturbance regime - CORRECT ANSWER-the characteristic disturbances that affect a given
ecological community
succession - CORRECT ANSWER-recovery that follows a severe disturbance
When does primary succession occur? - CORRECT ANSWER-happens when disturbance removes
soil and its organisms as well as organisms that live above soil surface
When does secondary succession occur? - CORRECT ANSWER-when a disturbance removes
some or all the organisms from an area but leaes the soil intact
which is more rapid, primary or secondary succession? - CORRECT ANSWER-secondary
succession
successional pathway - CORRECT ANSWER-specific sequence of species that appears over time
QUESTIONS AND VERIFIED
CORRECT ANSWERS
GRADED A+ LATEST 100%
GUARANTEED PASS
ectoparasites - CORRECT ANSWER-live on outside of host (like ticks)
parasitoid - CORRECT ANSWER-free-living as adult, but parasitic as larva, often kills host
parasitoidism - CORRECT ANSWER-when a parasitoid is free living adult but endoparasitic as a
larva, usually fatal
constitutive/standing defenses - CORRECT ANSWER-defenses that are always present
Batesian mimicry - CORRECT ANSWER-harmless/palatable species resembles a
dangerous/poisonous one
Mullerian mimicry - CORRECT ANSWER-mimicry in which two or more harmful species resemble
each other
,inducible defenses - CORRECT ANSWER-physical, chemical, or behavioral defensive traits that
are induced in the prey in response to the presence of a predator
how is consumption an agent of natural selection? - CORRECT ANSWER-it leads to a
coevolutionary arms race between predator and prey that drives evolutionary change
Four key attributes of community structure - CORRECT ANSWER-1) the total number of species
2) the sum of interactions among all species
3) the relative abundance of those species
4) the physical attributes of the community, which may include abiotic factors and biotic factors
food web - CORRECT ANSWER-overlapping food chains, summary of consumption interactions
in a community
bottom-up influences on community structure - CORRECT ANSWER-when abiotic factors
determine the abundance of primary producers (nutrients, sunlight, water etc.)
top-down influences on community structure - CORRECT ANSWER-when certain consumers
change the species diversity in a community
keystone species - CORRECT ANSWER-species with a greater influence on species diversity than
its abundance and total biomass suggest
example of top-down control - CORRECT ANSWER-when a consumer limits prey population
trophic cascade - CORRECT ANSWER-series of changes in abundance of species in a food web,
usually caused by the addition/removal of a key predator
, disturbance - CORRECT ANSWER-any strong, short-lived disruption to a community, changes the
distribution of living/non-living resources
examples of disturbances - CORRECT ANSWER-forest fires, windstorms, floods, fall of a large-
canopy tree, disease epidemics, short-term explosions in herbivore numbers
what do disturbances alter? - CORRECT ANSWER-light levels, nutrients, unoccupied space, and
other aspects of resource availabiliy
three factors contributing to the impact of a disturbance - CORRECT ANSWER-1. the type of
disturbance
2. its frequency
3. its severity
disturbance regime - CORRECT ANSWER-the characteristic disturbances that affect a given
ecological community
succession - CORRECT ANSWER-recovery that follows a severe disturbance
When does primary succession occur? - CORRECT ANSWER-happens when disturbance removes
soil and its organisms as well as organisms that live above soil surface
When does secondary succession occur? - CORRECT ANSWER-when a disturbance removes
some or all the organisms from an area but leaes the soil intact
which is more rapid, primary or secondary succession? - CORRECT ANSWER-secondary
succession
successional pathway - CORRECT ANSWER-specific sequence of species that appears over time
