NUFS-FINAL EXAM QUESTIONS AND
ANSWERS 100% PASS
What is the primary role of detritivores in an ecosystem? - ANS Releasing inorganic
compounds from living (or dead) organisms back into the soil or water
Which of the following is the primary (largest) carbon "sink" source in the U.S.? - ANS Forests
Which of the following statements about energy and nutrients in an ecosystem is true? -
ANS Energy flows through an ecosystem, whereas nutrients cycle
Study the diagram of an ecosystem above. If a farmer uses a pesticide to kill off all the
grasshoppers, what would be expected to happen to the frog population as a result? -
ANS They would starve and their population would decline
Which of the following materials would be appropriate for composting? (select ALL that apply) -
ANS 1. coffee grounds
2. manure
3. egg shells
4. fruit/veggie scraps
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Match the following biogeochemical on the left with its description on the right: - ANS The
slowest of the cycles does not involve the atmosphere = phosphorous cycle
Would be impossible without specialized bacteria "fixing" this nutrient into the soil = nitrogen
cycle
A highly dynamic (rapid and active) cycle, readily affected by global climate change = water cycle
Starts with sunlight and photosynthesis in plants = carbon cycle
Environmental consequences of livestock include which of the following? (check ALL that apply)
- ANS High energy costs of producing their feed
Greenhouse gas emissions (esp. methane)
Polluting waterways with their waste
Which of the following statements about "food miles" is incorrect? - ANS Purchasing
products with fewer food miles harms the sustainability of the local food supply and local
farmers
Which of the following is not a benefit of eating locally? - ANS Using energy to heat
greenhouses in cold climates to allow crops to grow year-round
Dembe owns a small herd of goats and her family raises a few chickens in a pen by their home.
She takes care of her goats every day. Her children drink their milk, a neighbor weaves cloth
from their hair in exchange for some goat cheese and butter, and the family slaughters a goat a
few times a year for feasts and holidays; they rarely sell a goat for profit unless they need some
cash money on hand. This type of animal husbandry is best described as: - ANS Subsistence
farming
The primary purpose of industrial agriculture (a.k.a. "conventional" farming) is best described
as: - ANS To maximize crop yields per acre and sell to markets locally and globally
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
ANSWERS 100% PASS
What is the primary role of detritivores in an ecosystem? - ANS Releasing inorganic
compounds from living (or dead) organisms back into the soil or water
Which of the following is the primary (largest) carbon "sink" source in the U.S.? - ANS Forests
Which of the following statements about energy and nutrients in an ecosystem is true? -
ANS Energy flows through an ecosystem, whereas nutrients cycle
Study the diagram of an ecosystem above. If a farmer uses a pesticide to kill off all the
grasshoppers, what would be expected to happen to the frog population as a result? -
ANS They would starve and their population would decline
Which of the following materials would be appropriate for composting? (select ALL that apply) -
ANS 1. coffee grounds
2. manure
3. egg shells
4. fruit/veggie scraps
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Match the following biogeochemical on the left with its description on the right: - ANS The
slowest of the cycles does not involve the atmosphere = phosphorous cycle
Would be impossible without specialized bacteria "fixing" this nutrient into the soil = nitrogen
cycle
A highly dynamic (rapid and active) cycle, readily affected by global climate change = water cycle
Starts with sunlight and photosynthesis in plants = carbon cycle
Environmental consequences of livestock include which of the following? (check ALL that apply)
- ANS High energy costs of producing their feed
Greenhouse gas emissions (esp. methane)
Polluting waterways with their waste
Which of the following statements about "food miles" is incorrect? - ANS Purchasing
products with fewer food miles harms the sustainability of the local food supply and local
farmers
Which of the following is not a benefit of eating locally? - ANS Using energy to heat
greenhouses in cold climates to allow crops to grow year-round
Dembe owns a small herd of goats and her family raises a few chickens in a pen by their home.
She takes care of her goats every day. Her children drink their milk, a neighbor weaves cloth
from their hair in exchange for some goat cheese and butter, and the family slaughters a goat a
few times a year for feasts and holidays; they rarely sell a goat for profit unless they need some
cash money on hand. This type of animal husbandry is best described as: - ANS Subsistence
farming
The primary purpose of industrial agriculture (a.k.a. "conventional" farming) is best described
as: - ANS To maximize crop yields per acre and sell to markets locally and globally
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
