BIOL 301 - Ecology and Evolution Exam
Questions Correct Answers Current
Update
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
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
Questions Correct Answers Current
Update
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
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
