BIO 1108 Exam 1 and Exam 2 | Updated
Questions and Correct Answers | Graded
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BIO 1108 Exam 1
What is an ecosystem? ---------CORRECT ANSWER-----------------A system where
living (biotic) and non-living (abiotic) components interact and exchange
energy/nutrients.
What are abiotic components? ---------CORRECT ANSWER-----------------
Temperature; precipitation; sunlight; soil; pH; nutrients; elevation.
Why are averages & seasonality important? ---------CORRECT ANSWER----------------
-They influence growth, reproduction, and survival of species.
What are biotic components? ---------CORRECT ANSWER-----------------Producers;
consumers; decomposers; symbiotic organisms.
What are natural disturbances? ---------CORRECT ANSWER-----------------Fires,
storms, volcanic eruptions.
,What are human disturbances? ---------CORRECT ANSWER-----------------Logging,
agriculture, urban development.
What defines a disturbance? ---------CORRECT ANSWER-----------------Scale (size);
frequency (how often); intensity (severity).
What is succession? ---------CORRECT ANSWER-----------------Natural progression of
community development after disturbance.
Which abiotic factors change with elevation? ---------CORRECT ANSWER--------------
---↓ Temperature; ↓ oxygen; ↑ UV; ↓ soil depth.
Which biotic factors change with elevation? ---------CORRECT ANSWER----------------
-Species composition; shorter growing seasons; specialized species.
How does elevation compare to latitude? ---------CORRECT ANSWER-----------------
Both create gradients and limit biodiversity.
, Which changes conditions faster: elevation or latitude? ---------CORRECT ANSWER-
----------------Elevation (over shorter distance).
Before MSH eruption ecosystem? ---------CORRECT ANSWER-----------------Mature
forest; rich soil; high vertical & horizontal biodiversity.
Post-eruption soil conditions? ---------CORRECT ANSWER-----------------Sterile
tephra; low nutrients; disrupted soil structure.
What is tephra? ---------CORRECT ANSWER-----------------Volcanic ash and rock;
limits plant growth.
Major impact zones on MSH? ---------CORRECT ANSWER-----------------Pumice plain;
scorch zone; blowdown zone; survivor patches.
Why were different zones affected differently? ---------CORRECT ANSWER------------
-----Proximity to blast, topography, wind direction, slope.
First colonizer plant on pumice plain? ---------CORRECT ANSWER-----------------
Lupine—a nitrogen-fixer.
Questions and Correct Answers | Graded
A+ | Verified Answers | Just Released
BIO 1108 Exam 1
What is an ecosystem? ---------CORRECT ANSWER-----------------A system where
living (biotic) and non-living (abiotic) components interact and exchange
energy/nutrients.
What are abiotic components? ---------CORRECT ANSWER-----------------
Temperature; precipitation; sunlight; soil; pH; nutrients; elevation.
Why are averages & seasonality important? ---------CORRECT ANSWER----------------
-They influence growth, reproduction, and survival of species.
What are biotic components? ---------CORRECT ANSWER-----------------Producers;
consumers; decomposers; symbiotic organisms.
What are natural disturbances? ---------CORRECT ANSWER-----------------Fires,
storms, volcanic eruptions.
,What are human disturbances? ---------CORRECT ANSWER-----------------Logging,
agriculture, urban development.
What defines a disturbance? ---------CORRECT ANSWER-----------------Scale (size);
frequency (how often); intensity (severity).
What is succession? ---------CORRECT ANSWER-----------------Natural progression of
community development after disturbance.
Which abiotic factors change with elevation? ---------CORRECT ANSWER--------------
---↓ Temperature; ↓ oxygen; ↑ UV; ↓ soil depth.
Which biotic factors change with elevation? ---------CORRECT ANSWER----------------
-Species composition; shorter growing seasons; specialized species.
How does elevation compare to latitude? ---------CORRECT ANSWER-----------------
Both create gradients and limit biodiversity.
, Which changes conditions faster: elevation or latitude? ---------CORRECT ANSWER-
----------------Elevation (over shorter distance).
Before MSH eruption ecosystem? ---------CORRECT ANSWER-----------------Mature
forest; rich soil; high vertical & horizontal biodiversity.
Post-eruption soil conditions? ---------CORRECT ANSWER-----------------Sterile
tephra; low nutrients; disrupted soil structure.
What is tephra? ---------CORRECT ANSWER-----------------Volcanic ash and rock;
limits plant growth.
Major impact zones on MSH? ---------CORRECT ANSWER-----------------Pumice plain;
scorch zone; blowdown zone; survivor patches.
Why were different zones affected differently? ---------CORRECT ANSWER------------
-----Proximity to blast, topography, wind direction, slope.
First colonizer plant on pumice plain? ---------CORRECT ANSWER-----------------
Lupine—a nitrogen-fixer.
