Ducks Unlimited 2024/2025 Exam
Questions and Corresponding Answers
with Surety of 100% Pass Mark
Ecological Levels of Organization (from biggest to smallest) - 🧠ANSWER
✔✔Biosphere (biomes), Ecosystem, Communities, Populations, Organism
Biomes - 🧠ANSWER ✔✔Aquatic, Forests, Grasslands, Wetlands
Denitrification (nitrogen cycle) - 🧠ANSWER ✔✔Where nitrogen molecules
are "fixed" back to usable nitrogen. This is done naturally by legumes,
algae, bacteria, and lightning
Phosphorus - 🧠ANSWER ✔✔Absorbed by plants through their roots
Photosynthesis - 🧠ANSWER ✔✔A process used by plants and other
autotrophs to capture light and energy and use it to power chemical
reactions that convert carbon dioxide and water into oxygen and chemical
energy.
Transpiration - 🧠ANSWER ✔✔Evaporation of water from the leaves of a
plant
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
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STATEMENT. ALL RIGHTS RESERVED
,Respiration - 🧠ANSWER ✔✔Inhalation and exhalation of air.
Nutrient cycles are required by organisms for... - 🧠ANSWER ✔✔Growth,
reproduction, and maintenance (not sleep)
Chlorophyll - 🧠ANSWER ✔✔Green pigment in plants that absorbs light
energy used to carry out photosynthesis
Bog - 🧠ANSWER ✔✔Wetland supplied by rainwater, acidic so they
accumulate dead and carnivorous plants
Fen - 🧠ANSWER ✔✔Wetland that is supplied by groundwater
Marsh - 🧠ANSWER ✔✔Wetland that has grasses and reeds. Can be tidal
or non-tidal.
Swamp - 🧠ANSWER ✔✔Forested (woody) wetland with large trees and
shrubs
Niche - 🧠ANSWER ✔✔Role of the organism in the community. Can be
competition, predation, parasitism, mutualism
Mutualism - 🧠ANSWER ✔✔A positive interaction and niche where both
species benefit
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
2
STATEMENT. ALL RIGHTS RESERVED
, Commensalism - 🧠ANSWER ✔✔A positive interaction that is not a niche
because one species benefits while the other is unaffected
Competition - 🧠ANSWER ✔✔A negative interaction and niche between two
organisms for the same resource
Predation - 🧠ANSWER ✔✔A negative interaction and niche where one
species kills another for food
Succession - 🧠ANSWER ✔✔The series of predictable changes that occur
in a community over time due to geological disturbances
Climax community - 🧠ANSWER ✔✔A stable, mature community that
undergoes little or no change in species over time after its final succession
Primary succession - 🧠ANSWER ✔✔An ecological succession that begins
in an area where no biotic community previously existed like glaciers
receding or volcanoes erupting.
Secondary succession - 🧠ANSWER ✔✔Succession following a
disturbance that destroys a community without destroying the soil like
forest fires
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
3
STATEMENT. ALL RIGHTS RESERVED
Questions and Corresponding Answers
with Surety of 100% Pass Mark
Ecological Levels of Organization (from biggest to smallest) - 🧠ANSWER
✔✔Biosphere (biomes), Ecosystem, Communities, Populations, Organism
Biomes - 🧠ANSWER ✔✔Aquatic, Forests, Grasslands, Wetlands
Denitrification (nitrogen cycle) - 🧠ANSWER ✔✔Where nitrogen molecules
are "fixed" back to usable nitrogen. This is done naturally by legumes,
algae, bacteria, and lightning
Phosphorus - 🧠ANSWER ✔✔Absorbed by plants through their roots
Photosynthesis - 🧠ANSWER ✔✔A process used by plants and other
autotrophs to capture light and energy and use it to power chemical
reactions that convert carbon dioxide and water into oxygen and chemical
energy.
Transpiration - 🧠ANSWER ✔✔Evaporation of water from the leaves of a
plant
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
1
STATEMENT. ALL RIGHTS RESERVED
,Respiration - 🧠ANSWER ✔✔Inhalation and exhalation of air.
Nutrient cycles are required by organisms for... - 🧠ANSWER ✔✔Growth,
reproduction, and maintenance (not sleep)
Chlorophyll - 🧠ANSWER ✔✔Green pigment in plants that absorbs light
energy used to carry out photosynthesis
Bog - 🧠ANSWER ✔✔Wetland supplied by rainwater, acidic so they
accumulate dead and carnivorous plants
Fen - 🧠ANSWER ✔✔Wetland that is supplied by groundwater
Marsh - 🧠ANSWER ✔✔Wetland that has grasses and reeds. Can be tidal
or non-tidal.
Swamp - 🧠ANSWER ✔✔Forested (woody) wetland with large trees and
shrubs
Niche - 🧠ANSWER ✔✔Role of the organism in the community. Can be
competition, predation, parasitism, mutualism
Mutualism - 🧠ANSWER ✔✔A positive interaction and niche where both
species benefit
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
2
STATEMENT. ALL RIGHTS RESERVED
, Commensalism - 🧠ANSWER ✔✔A positive interaction that is not a niche
because one species benefits while the other is unaffected
Competition - 🧠ANSWER ✔✔A negative interaction and niche between two
organisms for the same resource
Predation - 🧠ANSWER ✔✔A negative interaction and niche where one
species kills another for food
Succession - 🧠ANSWER ✔✔The series of predictable changes that occur
in a community over time due to geological disturbances
Climax community - 🧠ANSWER ✔✔A stable, mature community that
undergoes little or no change in species over time after its final succession
Primary succession - 🧠ANSWER ✔✔An ecological succession that begins
in an area where no biotic community previously existed like glaciers
receding or volcanoes erupting.
Secondary succession - 🧠ANSWER ✔✔Succession following a
disturbance that destroys a community without destroying the soil like
forest fires
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
3
STATEMENT. ALL RIGHTS RESERVED
