NR 439 Week 4 Graded
Discussion Topic: Designs – A
Plan to Study for the Truth
(Currently Updated 2026)
100% PASS.
Logistic growth is graphically represented by ______________________. - answer- s-
curve
In 'Chasing Rainbows,' you read that the mountain yellow-legged frog populations in
Yosemite National Park may be declining for multiple reasons, but the article focused on
the influence of ________________________.
Read the options carefully, then choose the best answer. - answer- a successful
introduced predator
In 'Chasing Rainbows', you read about the exhaustive efforts of the U.S. Forest Service,
California Fish and Game, and local citizens to restore the native rainbow trout
populations that were eradicated from some mountain lakes because they were
outcompeted by an exotic species. - answer- false
Natural populations are dynamic---they increase, decrease, and otherwise respond to
changes in their biotic and abiotic environment.
Which of the following is most criticalfor distinguishing between natural population
fluctuations and the population declines that some species are experiencing in the world
today? - answer- a long-term study of population data
Which of the following ARE examples of a population. - answer- All of the spotted
salamanders (Ambystoma maculatum) in New Hampshire
All of the cornflowers (Centauria cyanus) in France.
All of the people in Tanzania.
Based on 'values of Nature' that we discussed in lecture, is the following statement
TRUE or FALSE?
If a person believes that a particular species has an intrinsic right to exist just because it
exists, then that person clearly assigns emotional value to the species. - answer- false
, In lecture, we discussed the difference between 'species richness' and 'species
evenness.' Based on our discussion in lecture, is the following statement TRUE or
FALSE?
Species richness is a particularly descriptive measure of community composition (and
the diversity of species in a given area) -- it tells us not only the number of distinct
species in the community, but also their relative abundance. - answer- false
In lecture, I told you about skipper butterflies which are an example of "cryptic species".
What used to be thought of as 1 species of skipper butterfly is now recognized as 10
distinct species of butterflies, and the _______________________ Species Concept
was particularly helpful in figuring this out! - answer- Phylogenetic
In a recent lecture on Population Ecology, we discussed the 4 phases of logistic growth
(the S-shaped growth curve). I explained that the third phase of a logistic growth curve,
called the ________________, occurs as the population is approaching
_______________. - answer- deceleration phase; carrying capacity
The Lake Erie Water Snake and the Round Goby are both endemic to the islands in the
Western basin of Lake Erie. - answer- false
If two species occupy the same __________________ in a community, then according
to the competitive exclusion principle, the species that more efficiently exploits the
shared resource(s) (in other words, the better competitor) will eventually exclude the
other species from the community. - answer- niche
When we moved into our house (5 years ago), we inventoried the pond on our property
to understand which species belonged to our backyard amphibian community.
After 5 years, we re-inventoried our backyard pond to see what our current backyard
amphibian community is like.
In 2013, there were 3 frog species and 2 salamander species in the backyard
amphibian community.
Last summer, in 2018, there were 4 frog species and 1 salamander species in the
backyard amphibian community.
The change we observed in the composition of our backyard amphibian community is
best described as _______________________. - answer- species turnover
True or False?: Both species in a symbiotic relationship must benefit in some way from
the interaction. - answer- false
Discussion Topic: Designs – A
Plan to Study for the Truth
(Currently Updated 2026)
100% PASS.
Logistic growth is graphically represented by ______________________. - answer- s-
curve
In 'Chasing Rainbows,' you read that the mountain yellow-legged frog populations in
Yosemite National Park may be declining for multiple reasons, but the article focused on
the influence of ________________________.
Read the options carefully, then choose the best answer. - answer- a successful
introduced predator
In 'Chasing Rainbows', you read about the exhaustive efforts of the U.S. Forest Service,
California Fish and Game, and local citizens to restore the native rainbow trout
populations that were eradicated from some mountain lakes because they were
outcompeted by an exotic species. - answer- false
Natural populations are dynamic---they increase, decrease, and otherwise respond to
changes in their biotic and abiotic environment.
Which of the following is most criticalfor distinguishing between natural population
fluctuations and the population declines that some species are experiencing in the world
today? - answer- a long-term study of population data
Which of the following ARE examples of a population. - answer- All of the spotted
salamanders (Ambystoma maculatum) in New Hampshire
All of the cornflowers (Centauria cyanus) in France.
All of the people in Tanzania.
Based on 'values of Nature' that we discussed in lecture, is the following statement
TRUE or FALSE?
If a person believes that a particular species has an intrinsic right to exist just because it
exists, then that person clearly assigns emotional value to the species. - answer- false
, In lecture, we discussed the difference between 'species richness' and 'species
evenness.' Based on our discussion in lecture, is the following statement TRUE or
FALSE?
Species richness is a particularly descriptive measure of community composition (and
the diversity of species in a given area) -- it tells us not only the number of distinct
species in the community, but also their relative abundance. - answer- false
In lecture, I told you about skipper butterflies which are an example of "cryptic species".
What used to be thought of as 1 species of skipper butterfly is now recognized as 10
distinct species of butterflies, and the _______________________ Species Concept
was particularly helpful in figuring this out! - answer- Phylogenetic
In a recent lecture on Population Ecology, we discussed the 4 phases of logistic growth
(the S-shaped growth curve). I explained that the third phase of a logistic growth curve,
called the ________________, occurs as the population is approaching
_______________. - answer- deceleration phase; carrying capacity
The Lake Erie Water Snake and the Round Goby are both endemic to the islands in the
Western basin of Lake Erie. - answer- false
If two species occupy the same __________________ in a community, then according
to the competitive exclusion principle, the species that more efficiently exploits the
shared resource(s) (in other words, the better competitor) will eventually exclude the
other species from the community. - answer- niche
When we moved into our house (5 years ago), we inventoried the pond on our property
to understand which species belonged to our backyard amphibian community.
After 5 years, we re-inventoried our backyard pond to see what our current backyard
amphibian community is like.
In 2013, there were 3 frog species and 2 salamander species in the backyard
amphibian community.
Last summer, in 2018, there were 4 frog species and 1 salamander species in the
backyard amphibian community.
The change we observed in the composition of our backyard amphibian community is
best described as _______________________. - answer- species turnover
True or False?: Both species in a symbiotic relationship must benefit in some way from
the interaction. - answer- false
