Exam 3 PS116 Study Guide Final Exam (
Updated 2025 ) 1 100 Complete Questions
& Answers (Solved) 100% Correct
What are the six characteristics of ecosytems? -
✔✔ANSWER ✔✔-animals (consumers), plants
(producers), and fungi and microscopic organisms
(decomposers); the nonliving (abiotic) parts include the
sun, water, air (gases), and rocks
What is the difference between biotic and abiotic
ecosystem components? - ✔✔ANSWER ✔✔-Biotic
factors are living things within an ecosystem; such as
plants, animals, and bacteria, while abiotic are non-living
components; such as water, soil and atmosphere
,How does an ecosystem circulate matter and energy? -
✔✔ANSWER ✔✔-Dead producers and consumers and
their waste products provide matter and energy to
decomposers
What is an ecological niche? - ✔✔ANSWER ✔✔-
describing both the range of conditions necessary for
persistence of the species, and its ecological role in the
ecosystem
What is the law of unintended consequences? -
✔✔ANSWER ✔✔-actions of people, and especially of
governments, always have effects that are unanticipated
or "unintended."
What is the equilibrium hypothesis in regard to
ecosystems? - ✔✔ANSWER ✔✔-whenever all of the
living and nonliving factors in a geographic area are in
balance
, What contributed to the loss of the Aral Sea? -
✔✔ANSWER ✔✔-unsustainable cotton cultivation
What is the theory of island biogeography? -
✔✔ANSWER ✔✔-species diversity on an island is
positively related to the size of the island, but negatively
related by the island's distance to the mainland
Why doesn't garbage in urban landfills quickly
decompose? - ✔✔ANSWER ✔✔-food, grass clippings,
and other organic material are densely packed and thus
decompose with the absence of oxygen (anaerobically)
Why is the ozone layer important to Earth's inhabitants?
- ✔✔ANSWER ✔✔-protecting life on Earth's surface from
exposure to harmful levels of this radiation, which can
damage and disrupt DNA
What are the atmospheric products of burning fossil
fuels? - ✔✔ANSWER ✔✔-Carbon Monoxide (CO), Carbon
Dioxide (CO2), Sulfur (SO2), Nitrogen Dioxide (NOx),
Updated 2025 ) 1 100 Complete Questions
& Answers (Solved) 100% Correct
What are the six characteristics of ecosytems? -
✔✔ANSWER ✔✔-animals (consumers), plants
(producers), and fungi and microscopic organisms
(decomposers); the nonliving (abiotic) parts include the
sun, water, air (gases), and rocks
What is the difference between biotic and abiotic
ecosystem components? - ✔✔ANSWER ✔✔-Biotic
factors are living things within an ecosystem; such as
plants, animals, and bacteria, while abiotic are non-living
components; such as water, soil and atmosphere
,How does an ecosystem circulate matter and energy? -
✔✔ANSWER ✔✔-Dead producers and consumers and
their waste products provide matter and energy to
decomposers
What is an ecological niche? - ✔✔ANSWER ✔✔-
describing both the range of conditions necessary for
persistence of the species, and its ecological role in the
ecosystem
What is the law of unintended consequences? -
✔✔ANSWER ✔✔-actions of people, and especially of
governments, always have effects that are unanticipated
or "unintended."
What is the equilibrium hypothesis in regard to
ecosystems? - ✔✔ANSWER ✔✔-whenever all of the
living and nonliving factors in a geographic area are in
balance
, What contributed to the loss of the Aral Sea? -
✔✔ANSWER ✔✔-unsustainable cotton cultivation
What is the theory of island biogeography? -
✔✔ANSWER ✔✔-species diversity on an island is
positively related to the size of the island, but negatively
related by the island's distance to the mainland
Why doesn't garbage in urban landfills quickly
decompose? - ✔✔ANSWER ✔✔-food, grass clippings,
and other organic material are densely packed and thus
decompose with the absence of oxygen (anaerobically)
Why is the ozone layer important to Earth's inhabitants?
- ✔✔ANSWER ✔✔-protecting life on Earth's surface from
exposure to harmful levels of this radiation, which can
damage and disrupt DNA
What are the atmospheric products of burning fossil
fuels? - ✔✔ANSWER ✔✔-Carbon Monoxide (CO), Carbon
Dioxide (CO2), Sulfur (SO2), Nitrogen Dioxide (NOx),
