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BIOL 301 - Ecology And Evolution Verified Answers (2025)!!
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BIOL 301 - Ecology And Evolution Verified Answers (2025)!!
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BIOL 301 - Ecology And EvolutionVerified Answers (2025)!!
In the Lotka-Volterra population model which persists over time, which of
the following describes the change in prey population? - Answer Both
increasing and decreasing
There are communities of mammalian species which inhabit a tropical
rainforest. Which kind of pattern would you expect to see in one of these
communities? - Answer Most species are rare, whereas the few other
species are represented by relatively many individuals
Above is a [graph] of the predator-prey model which shows that their
population sizes change in a predictable way. What would you expect to
theoretically happen to the above cycle labelled B after time has passed? -
Answer The predators disappear
In the oceans there are coral reef systems which are complex and
productive ecological systems. Let us assume these systems have species
with very large population sizes. If the organisms at all levels developed
adaptions to increase ecological efficiency between trophic levels, which of
the following would likely result over evolutionary time scales? - Answer
The trophic pyramid would contract and additional trophic levels would be
expected to emerge
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, Species richness over time for a given geographical region could be
modeled as the birth and death of species. Given this geographical region
and no migration, if the birth rate is one new species per million years and
the death rate is 1.5 species per million years, what would be the outcome
for species richness in this region? - Answer The species richness
would eventually reach 0
Ecosystems can be understood by viewing them abstractedly as the energy
flow among trophic levels. A portion of the energy assimilated by a lower
trophic level is then available to a higher trophic level. If we were to
observe a salt marsh ecosystem with a lower trophic level containing only
"marsh grass," then the energy in this lower level that is available to
primary consumers is called: - Answer Net primary production
In an idealized ecological system with three closed communities, one
expects to observe which of the following? - Answer Ecotones
[Graph] His plot shows % Increase on the y-axis; this refers to the amount
of increase in grain production. The x-axis shows Difference of biomass;
this essentially refers to the biomass of earthworms in this ecological
system. Each data point refers to one tropical agricultural site where they
are growing grain. Given the knowledge from this plot, if we examine
additional tropical agricultural sites where the wheat is grown, how will
primary productivity change when the earthworm biomass is increasing
over time? - Answer Primary productivity will increase
What is it called when the earthworms, a primary consumer (of organic
waste), have an effect on grain production? - Answer Top-down effect
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