Biology 152 - Ecology Exam with precise | | | | | | |
detailed solutions |
ecology - Correct answer ✔the scientific study of the interactions between
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organism and the environment; the study of the distribution and abundance of
| | | | | | | | | | | |
species
It seems highly likely that rainfall amount influences forest growth but how
| | | | | | | | | | | |
would you design an experiment to test this hypothesis? - Correct answer ✔Put
| | | | | | | | | | | | |
shelters over parts of a forest to create low rain treatments
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limitations to distribution - Correct answer ✔dispersal, behavior, biotic factors,
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abiotic factors
|
examples of abiotic factors that could limit distribution - Correct answer
| | | | | | | | | | |
✔chemical factors such as water, oxygen or pH and physical factors such as
| | | | | | | | | | | | |
temperature, light, or soil structure | | | |
what temperature would the earth's surface be without green house gasses -
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Correct answer ✔-18 degrees Celsius
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what temperature is the earth's surface because of green house gasses - Correct
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answer ✔15 degrees Celsius
| | |
,explain the green house gas effect - Correct answer ✔The sun sends waves to
| | | | | | | | | | | | | |
the earth, these waves are either reflected of the earth's surface or absorbed by
| | | | | | | | | | | | | |
the earth's surface. The waves reflected off are long-wave radiation, and they are
| | | | | | | | | | | |
sometimes absorbed by green house gasses (such as H2O, CO2, and CH4) and
| | | | | | | | | | | | | |
re-emitted in many directions; some of these go back to the earth's surface and
| | | | | | | | | | | | | |
help heat it. | |
how much sunlight is reflected off the earth's surface - Correct answer ✔30%
| | | | | | | | | | | |
albedo - Correct answer ✔back-scatter short-wave radiation off the earth's
| | | | | | | | | |
surface
why do we need the cosine correction - Correct answer ✔the earth is tilted at
| | | | | | | | | | | | | | |
23.5 degrees |
explain why the equatorial area is tropical but just 30 degrees above/below is
| | | | | | | | | | | | |
arid (lecture 3) - Correct answer ✔moist air turns to rain over in the tropics and
| | | | | | | | | | | | | | | |
all the dry air that's left circles up/down
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define each variable for this equation
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M + Q = R + C + E + G + S - Correct answer ✔M= metabolism
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Q= radiations absorbed by the organism
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R= electromagnetic radiation emitted by the organism
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C= heat lost through convection (wind)
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E= transpiration (sweating)
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G= conductance |
, S= storage
|
what is the main way a leaf cools on a calm day - Correct answer ✔transpiration
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(E)
|
what is the main way a leaf cools on a windy day - Correct answer ✔convection
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(C)
why would a snake choose to rest on a medium size rock rather than a large or
| | | | | | | | | | | | | | | | |
small one - Correct answer ✔they need to be the correct temperature since they
| | | | | | | | | | | | | |
are cold blooded; the large rocks don't heat up enough and the small rocks heat
| | | | | | | | | | | | | | |
up too much
| |
population - Correct answer ✔a group of individuals of a single species living in
| | | | | | | | | | | | | |
the same general area
| | |
what four processes affect population size - Correct answer ✔births, deaths,
| | | | | | | | | | |
immigration, emigration |
demography - Correct answer ✔the study of the vital statistics of a population
| | | | | | | | | | | | |
and how they change over time
| | | | |
per capita rate of increase - Correct answer ✔deltaN=(births+immigrants)-
| | | | | | | |
(deaths+emigrants)
population growth rate equation - Correct answer ✔dN/dt=B-D | | | | | | |
detailed solutions |
ecology - Correct answer ✔the scientific study of the interactions between
| | | | | | | | | | |
organism and the environment; the study of the distribution and abundance of
| | | | | | | | | | | |
species
It seems highly likely that rainfall amount influences forest growth but how
| | | | | | | | | | | |
would you design an experiment to test this hypothesis? - Correct answer ✔Put
| | | | | | | | | | | | |
shelters over parts of a forest to create low rain treatments
| | | | | | | | | |
limitations to distribution - Correct answer ✔dispersal, behavior, biotic factors,
| | | | | | | | | |
abiotic factors
|
examples of abiotic factors that could limit distribution - Correct answer
| | | | | | | | | | |
✔chemical factors such as water, oxygen or pH and physical factors such as
| | | | | | | | | | | | |
temperature, light, or soil structure | | | |
what temperature would the earth's surface be without green house gasses -
| | | | | | | | | | | |
Correct answer ✔-18 degrees Celsius
| | | |
what temperature is the earth's surface because of green house gasses - Correct
| | | | | | | | | | | | |
answer ✔15 degrees Celsius
| | |
,explain the green house gas effect - Correct answer ✔The sun sends waves to
| | | | | | | | | | | | | |
the earth, these waves are either reflected of the earth's surface or absorbed by
| | | | | | | | | | | | | |
the earth's surface. The waves reflected off are long-wave radiation, and they are
| | | | | | | | | | | |
sometimes absorbed by green house gasses (such as H2O, CO2, and CH4) and
| | | | | | | | | | | | | |
re-emitted in many directions; some of these go back to the earth's surface and
| | | | | | | | | | | | | |
help heat it. | |
how much sunlight is reflected off the earth's surface - Correct answer ✔30%
| | | | | | | | | | | |
albedo - Correct answer ✔back-scatter short-wave radiation off the earth's
| | | | | | | | | |
surface
why do we need the cosine correction - Correct answer ✔the earth is tilted at
| | | | | | | | | | | | | | |
23.5 degrees |
explain why the equatorial area is tropical but just 30 degrees above/below is
| | | | | | | | | | | | |
arid (lecture 3) - Correct answer ✔moist air turns to rain over in the tropics and
| | | | | | | | | | | | | | | |
all the dry air that's left circles up/down
| | | | | | |
define each variable for this equation
| | | | |
M + Q = R + C + E + G + S - Correct answer ✔M= metabolism
| | | | | | | | | | | | | | | | | |
Q= radiations absorbed by the organism
| | | | |
R= electromagnetic radiation emitted by the organism
| | | | | | |
C= heat lost through convection (wind)
| | | | |
E= transpiration (sweating)
| |
G= conductance |
, S= storage
|
what is the main way a leaf cools on a calm day - Correct answer ✔transpiration
| | | | | | | | | | | | | | |
(E)
|
what is the main way a leaf cools on a windy day - Correct answer ✔convection
| | | | | | | | | | | | | | | |
(C)
why would a snake choose to rest on a medium size rock rather than a large or
| | | | | | | | | | | | | | | | |
small one - Correct answer ✔they need to be the correct temperature since they
| | | | | | | | | | | | | |
are cold blooded; the large rocks don't heat up enough and the small rocks heat
| | | | | | | | | | | | | | |
up too much
| |
population - Correct answer ✔a group of individuals of a single species living in
| | | | | | | | | | | | | |
the same general area
| | |
what four processes affect population size - Correct answer ✔births, deaths,
| | | | | | | | | | |
immigration, emigration |
demography - Correct answer ✔the study of the vital statistics of a population
| | | | | | | | | | | | |
and how they change over time
| | | | |
per capita rate of increase - Correct answer ✔deltaN=(births+immigrants)-
| | | | | | | |
(deaths+emigrants)
population growth rate equation - Correct answer ✔dN/dt=B-D | | | | | | |
