Bio182 NAU Exam 1 UPDATED ACTUAL
Exam Questions and CORRECT Answers
What is TFR and how does it influence the predictions on future human population? -
CORRECT ANSWER - Total Fertility Rate:
Average number of live births a woman has during her lifetime
Shows population growth
What are the 4 main human caused factors to the loss of biodiversity? - CORRECT
ANSWER - Habitat Destruction, Invasive Species, Pollution, Overexploitation
What is Biomagnification? - CORRECT ANSWER - Tendency of certain chemicals to
accumulate or build up within food chains
What is the other name for the global water cycle? - CORRECT ANSWER - Hydrological
cycle
Where does most of the water that reaches the atmosphere come from? - CORRECT
ANSWER - Evaporation and transpiration
How have humans influenced the water cycle? - CORRECT ANSWER - Hydroelectric
dams, tapping aquifers, deforestation
Estuaries, losing evapotranspiration
What are the 3 main biogeochemical cycles we discussed? - CORRECT ANSWER -
Carbon, Phosphorus, and Nitrogen
What is the definition of a community? - CORRECT ANSWER - Assemblage of many
populations that live in the same place at the same time
, What is Species richness? - CORRECT ANSWER - Number of different species in each
community
What is Species Diversity? - CORRECT ANSWER - The variety of species that make up
the community
What is the difference between Species Diversity and Richness? - CORRECT ANSWER -
Species diversity has more abundance/evenness
What is the role of metagenomics in helping estimates species diversity? What types of
organisms does it really help this task for? - CORRECT ANSWER - Finding diversity of
microorganisms
Collecting microbial genomes
Using cultures
Explain the intermediate-disturbance hypothesis - CORRECT ANSWER - Highest number
of species are maintained in communities with intermediate levels of disturbance
What are disturbances? Be able to give some examples - CORRECT ANSWER -
Droughts, fires, hurricanes
Species interactions such as herbivory, predation, or parasitism
What is the name of the process that occurs after disturbances that is the system trying to reset
itself? - CORRECT ANSWER - Ecological Succesion (Primary and Secondary)
Facilitation successional model - CORRECT ANSWER - Species replacement facilitated
by previous colonists
Inhibition successional model - CORRECT ANSWER - Species replacement is inhibited
by previous colonists
Exam Questions and CORRECT Answers
What is TFR and how does it influence the predictions on future human population? -
CORRECT ANSWER - Total Fertility Rate:
Average number of live births a woman has during her lifetime
Shows population growth
What are the 4 main human caused factors to the loss of biodiversity? - CORRECT
ANSWER - Habitat Destruction, Invasive Species, Pollution, Overexploitation
What is Biomagnification? - CORRECT ANSWER - Tendency of certain chemicals to
accumulate or build up within food chains
What is the other name for the global water cycle? - CORRECT ANSWER - Hydrological
cycle
Where does most of the water that reaches the atmosphere come from? - CORRECT
ANSWER - Evaporation and transpiration
How have humans influenced the water cycle? - CORRECT ANSWER - Hydroelectric
dams, tapping aquifers, deforestation
Estuaries, losing evapotranspiration
What are the 3 main biogeochemical cycles we discussed? - CORRECT ANSWER -
Carbon, Phosphorus, and Nitrogen
What is the definition of a community? - CORRECT ANSWER - Assemblage of many
populations that live in the same place at the same time
, What is Species richness? - CORRECT ANSWER - Number of different species in each
community
What is Species Diversity? - CORRECT ANSWER - The variety of species that make up
the community
What is the difference between Species Diversity and Richness? - CORRECT ANSWER -
Species diversity has more abundance/evenness
What is the role of metagenomics in helping estimates species diversity? What types of
organisms does it really help this task for? - CORRECT ANSWER - Finding diversity of
microorganisms
Collecting microbial genomes
Using cultures
Explain the intermediate-disturbance hypothesis - CORRECT ANSWER - Highest number
of species are maintained in communities with intermediate levels of disturbance
What are disturbances? Be able to give some examples - CORRECT ANSWER -
Droughts, fires, hurricanes
Species interactions such as herbivory, predation, or parasitism
What is the name of the process that occurs after disturbances that is the system trying to reset
itself? - CORRECT ANSWER - Ecological Succesion (Primary and Secondary)
Facilitation successional model - CORRECT ANSWER - Species replacement facilitated
by previous colonists
Inhibition successional model - CORRECT ANSWER - Species replacement is inhibited
by previous colonists
