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Bio182 NAU Exam 1 (Questions & Answers) Rated 100% Correct!!
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How have humans influenced the water cycle? - ️️Hydroelectric dams, tapping aquifers, deforestation Estuaries, losing evapotranspiration What are the 4 main human caused factors to the loss of biodiversity? - ️️Habitat Destruction, Invasive Species, Pollution, Overexploitation What is ...

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  • October 17, 2024
  • 6
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • bio182 nau

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  • Bio182 NAU
  • Bio182 NAU

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Bio182 NAU Exam 1
How have humans influenced the water cycle? - ✔️✔️Hydroelectric dams, tapping
aquifers, deforestation
Estuaries, losing evapotranspiration


What are the 4 main human caused factors to the loss of biodiversity? - ✔️✔️Habitat
Destruction, Invasive Species, Pollution, Overexploitation

What is Biomagnification? - ✔️✔️Tendency of certain chemicals to accumulate or build
up within food chains

What is the other name for the global water cycle? - ✔️✔️Hydrological cycle

Where does most of the water that reaches the atmosphere come from? -
✔️✔️Evaporation and transpiration


What are the 3 main biogeochemical cycles we discussed? - ✔️✔️Carbon,
Phosphorus, and Nitrogen

What is the definition of a community? - ✔️✔️Assemblage of many populations that live
in the same place at the same time

What is Species richness? - ✔️✔️Number of different species in each community

What is Species Diversity? - ✔️✔️The variety of species that make up the community

What is the difference between Species Diversity and Richness? - ✔️✔️Species
diversity has more abundance/evenness


What is TFR and how does it influence the predictions on future human population? -
✔️✔️Total Fertility Rate:
Average number of live births a woman has during her lifetime
Shows population growth
What is the role of metagenomics in helping estimates species diversity? What types of
organisms does it really help this task for? - ✔️✔️Finding diversity of microorganisms
Collecting microbial genomes
Using cultures

, Explain the intermediate-disturbance hypothesis - ✔️✔️Highest number of species are
maintained in communities with intermediate levels of disturbance

What are disturbances? Be able to give some examples - ✔️✔️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? - ✔️✔️Ecological Succesion (Primary and Secondary)

Facilitation successional model - ✔️✔️Species replacement facilitated by previous
colonists

Inhibition successional model - ✔️✔️Species replacement is inhibited by previous
colonists

Early colonists may exclude subsequent colonists

Intertidal zone

Tolerance successional model - ✔️✔️Species replacement is unaffected by previous
colonists

Any specie can start the succession, but eventual climax community is reached in a
somewhat orderly fashion


What is the definition of an ecosystem? How does it differ from a community? -
✔️✔️Community of specie in a given area
Includes all abiotic factors:
Energy, soil characteristics, water

Energy and chemical flow? - ✔️✔️Energy flows through a system, while chemicals are
recycled within/between it.

What percentage of the total amount of solar radiation that hits the earth each day is
actually converted to chemical energy by plants via photosynthesis? - ✔️✔️About 1%

What is primary production? - ✔️✔️The rate at which an ecosystems producers convert
solar energy to chemical energy stored in biomass

Which biomes are most productive? - ✔️✔️Terrestrial
Tropical Rain forest
Temperate Broadleaf

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