NR 435 Exam 1 (Modules 1–3) – 2025/2026 Updated Study
Guide & Practice Questions | 100% Pass Guarantee
Ecology - correct answerScientific study of interactions among organisms and between
organisms and their environment
populations - correct answerAll the members of one species in a particular area
community - correct answerAll the different populations that live together in an area
r-selected species - correct answera species that has a high intrinsic growth rate, which
often leads to population overshoots and die-offs. large amounts of offspring, short-life.
Ex. Rabbits
K-selected species - correct answerSpecies that produce a few, often fairly large
offspring but invest a great deal of time and energy to ensure that most of those
offspring reach adulthood. Ex. Kangaroos
logistic growth - correct answers-shaped Population growth that is controlled by limited
resources
density dependent factors - correct answerlimiting factor that depends on population
size
ex. preditation
tends to be biotic factors- ie disease
density independent factors - correct answerlimiting factors whose influence is not
affected by population density
tends to be abiotic factors
Ex .tsunamis
carrying capacity - correct answerLargest number of individuals of a population that a
environment can support
determined by resource availability
Romantic-Transcendental Preservation Ethic - correct answerJohn Muir: believed that
communion with nature brings people closer to god and enlightenment
• Believed in preservation
• People centered, emphasis on humans
• Didn't claim nature had intrinsic value (value independent of its usefulness to humans)
, resource conservation ethic - correct answerThe belief that people should maximize use
of resources, based on the greatest good for everyone.
Land Ethic - correct answerAldo Leopold's philosophy - we are all connected-advocating
human use of natural resources that is compatible with or even enhances ecosystem
health
Intrinsic value of biodiversity - correct answerright to exist simply because it exists
Entrinsic Value - correct answerhas value because we can eat it, sell it,
-Aesthetic value: its beautiful
-Emotional Value
-Environmental Value
exponential growth - correct answerJ-shaped proportional to the size of the population.
Growth pattern in which the individuals in a population reproduce at a constant rate
how is population dispersion different from population density - correct answer
ecological specialist - correct answeranimals that require very unique resources
ex. pandas only eat bamboo.
ecological generalist - correct answercan eat a variety of foods and thrive in a range of
habitats
ex. racoons
endemic species - correct answerspecies that are native to and found only within a
limited area
Speciation - correct answerhow species form over-time
morphological species concept - correct answercharacterizes a species by body shape
and other structural features
biological species concept - correct answerSpecies is a group of populations whose
members have the potential to produce fertile offspring.
phylogentic species concept - correct answerA definition of species as the smallest
group of individuals that share a common ancestor, forming one branch on the tree of
life.
trophic cascade - correct answerA series of changes in the population sizes of
organisms at different trophic levels in a food chain, occurring when predators at high
trophic levels indirectly promote populations of organisms at low trophic levels by
keeping species at intermediate trophic levels in check. Trophic cascades may become
apparent when a top predator is eliminated from a system.
Guide & Practice Questions | 100% Pass Guarantee
Ecology - correct answerScientific study of interactions among organisms and between
organisms and their environment
populations - correct answerAll the members of one species in a particular area
community - correct answerAll the different populations that live together in an area
r-selected species - correct answera species that has a high intrinsic growth rate, which
often leads to population overshoots and die-offs. large amounts of offspring, short-life.
Ex. Rabbits
K-selected species - correct answerSpecies that produce a few, often fairly large
offspring but invest a great deal of time and energy to ensure that most of those
offspring reach adulthood. Ex. Kangaroos
logistic growth - correct answers-shaped Population growth that is controlled by limited
resources
density dependent factors - correct answerlimiting factor that depends on population
size
ex. preditation
tends to be biotic factors- ie disease
density independent factors - correct answerlimiting factors whose influence is not
affected by population density
tends to be abiotic factors
Ex .tsunamis
carrying capacity - correct answerLargest number of individuals of a population that a
environment can support
determined by resource availability
Romantic-Transcendental Preservation Ethic - correct answerJohn Muir: believed that
communion with nature brings people closer to god and enlightenment
• Believed in preservation
• People centered, emphasis on humans
• Didn't claim nature had intrinsic value (value independent of its usefulness to humans)
, resource conservation ethic - correct answerThe belief that people should maximize use
of resources, based on the greatest good for everyone.
Land Ethic - correct answerAldo Leopold's philosophy - we are all connected-advocating
human use of natural resources that is compatible with or even enhances ecosystem
health
Intrinsic value of biodiversity - correct answerright to exist simply because it exists
Entrinsic Value - correct answerhas value because we can eat it, sell it,
-Aesthetic value: its beautiful
-Emotional Value
-Environmental Value
exponential growth - correct answerJ-shaped proportional to the size of the population.
Growth pattern in which the individuals in a population reproduce at a constant rate
how is population dispersion different from population density - correct answer
ecological specialist - correct answeranimals that require very unique resources
ex. pandas only eat bamboo.
ecological generalist - correct answercan eat a variety of foods and thrive in a range of
habitats
ex. racoons
endemic species - correct answerspecies that are native to and found only within a
limited area
Speciation - correct answerhow species form over-time
morphological species concept - correct answercharacterizes a species by body shape
and other structural features
biological species concept - correct answerSpecies is a group of populations whose
members have the potential to produce fertile offspring.
phylogentic species concept - correct answerA definition of species as the smallest
group of individuals that share a common ancestor, forming one branch on the tree of
life.
trophic cascade - correct answerA series of changes in the population sizes of
organisms at different trophic levels in a food chain, occurring when predators at high
trophic levels indirectly promote populations of organisms at low trophic levels by
keeping species at intermediate trophic levels in check. Trophic cascades may become
apparent when a top predator is eliminated from a system.
