ICEV CORE EXAM SET 2026/2027 QUESTIONS AND
SOLUTIONS RATED A+
✔✔What typically triggers migration for waterfowl? - ✔✔Photoperiods.
✔✔Waterfowl belong to which taxonomic class? - ✔✔Aves.
✔✔What percentage of nests will hatch? - ✔✔15%.
✔✔Where are lamellae located? - ✔✔In the bill of the bird.
✔✔What would prevent further degradation of a habitat? - ✔✔Habitat fragmentation.
✔✔What type of wetland is dominated by emergent vegetation? - ✔✔Marshes.
✔✔What is peat? - ✔✔Partially decomposed organic matter.
✔✔How much water can one acre of wetland filter a month? - ✔✔7.3 gallons.
✔✔What best describes agroforestry? - ✔✔Trees grown in agriculture to stabilize
conditions.
✔✔What does commensalism mean? - ✔✔One species benefits while the host is
unaffected.
✔✔What are swamps dominated by? - ✔✔Trees.
✔✔What are marshes dominated by? - ✔✔Emergent vegetation.
✔✔What abiotic factors add nitrogen back to soil? - ✔✔Lightning strikes.
✔✔What is the carbon cycle? - ✔✔Release of carbon between atmosphere and
organisms.
✔✔Where are nitrogen-fixing bacteria found? - ✔✔On plant roots.
✔✔What occurs in the phosphorous cycle? - ✔✔In soil with plant roots.
✔✔What is a food chain? - ✔✔Linear representation of energy flow.
✔✔What are lichens in primary succession? - ✔✔Pioneer species.
✔✔What is the most diverse habitat in the world? - ✔✔Tropical Rainforest.
, ✔✔What percentage of the U.S. is covered by forests? - ✔✔33%.
✔✔What is reforestation? - ✔✔Replanting trees where they once were.
✔✔What are grasslands? - ✔✔Semi-arid land with less than 35 inches of rain.
✔✔What is groundwater recharge? - ✔✔Surface water replenishing underground
aquifers.
✔✔What is aerenchyma? - ✔✔Spongy tissue in plants.
✔✔What is the difference between anaerobic and aerobic? - ✔✔Anaerobic = low/no
oxygen; Aerobic = with oxygen.
✔✔What is baseflow contribution? - ✔✔Steady flow of water into streams from
underground.
✔✔What is biological productivity? - ✔✔Energy consumed resulting in biomass growth.
✔✔What is wetland physical trapping? - ✔✔Wetlands slow water flow, purifying water.
✔✔How much water can one acre of wetlands filter a year? - ✔✔7.3 million gallons.
✔✔What is the national goal for wetlands? - ✔✔No net loss.
✔✔What is Water Quality Trading? - ✔✔Organizations paid to reduce pollution.
✔✔What is density? - ✔✔Number of organisms per unit of area.
✔✔What is fecundity? - ✔✔Potential for reproduction.
✔✔What do density dependent factors involve? - ✔✔Living organisms.
✔✔What do density independent factors involve? - ✔✔Non-living abiotic factors.
✔✔What is putting out food plots? - ✔✔A way to manipulate habitats.
✔✔What defines vulnerable species? - ✔✔Numbers reduced by 30-50%.
✔✔What defines endangered species? - ✔✔Numbers reduced by 50-70%.
✔✔What defines critically endangered species? - ✔✔Numbers reduced by 80-90%.
SOLUTIONS RATED A+
✔✔What typically triggers migration for waterfowl? - ✔✔Photoperiods.
✔✔Waterfowl belong to which taxonomic class? - ✔✔Aves.
✔✔What percentage of nests will hatch? - ✔✔15%.
✔✔Where are lamellae located? - ✔✔In the bill of the bird.
✔✔What would prevent further degradation of a habitat? - ✔✔Habitat fragmentation.
✔✔What type of wetland is dominated by emergent vegetation? - ✔✔Marshes.
✔✔What is peat? - ✔✔Partially decomposed organic matter.
✔✔How much water can one acre of wetland filter a month? - ✔✔7.3 gallons.
✔✔What best describes agroforestry? - ✔✔Trees grown in agriculture to stabilize
conditions.
✔✔What does commensalism mean? - ✔✔One species benefits while the host is
unaffected.
✔✔What are swamps dominated by? - ✔✔Trees.
✔✔What are marshes dominated by? - ✔✔Emergent vegetation.
✔✔What abiotic factors add nitrogen back to soil? - ✔✔Lightning strikes.
✔✔What is the carbon cycle? - ✔✔Release of carbon between atmosphere and
organisms.
✔✔Where are nitrogen-fixing bacteria found? - ✔✔On plant roots.
✔✔What occurs in the phosphorous cycle? - ✔✔In soil with plant roots.
✔✔What is a food chain? - ✔✔Linear representation of energy flow.
✔✔What are lichens in primary succession? - ✔✔Pioneer species.
✔✔What is the most diverse habitat in the world? - ✔✔Tropical Rainforest.
, ✔✔What percentage of the U.S. is covered by forests? - ✔✔33%.
✔✔What is reforestation? - ✔✔Replanting trees where they once were.
✔✔What are grasslands? - ✔✔Semi-arid land with less than 35 inches of rain.
✔✔What is groundwater recharge? - ✔✔Surface water replenishing underground
aquifers.
✔✔What is aerenchyma? - ✔✔Spongy tissue in plants.
✔✔What is the difference between anaerobic and aerobic? - ✔✔Anaerobic = low/no
oxygen; Aerobic = with oxygen.
✔✔What is baseflow contribution? - ✔✔Steady flow of water into streams from
underground.
✔✔What is biological productivity? - ✔✔Energy consumed resulting in biomass growth.
✔✔What is wetland physical trapping? - ✔✔Wetlands slow water flow, purifying water.
✔✔How much water can one acre of wetlands filter a year? - ✔✔7.3 million gallons.
✔✔What is the national goal for wetlands? - ✔✔No net loss.
✔✔What is Water Quality Trading? - ✔✔Organizations paid to reduce pollution.
✔✔What is density? - ✔✔Number of organisms per unit of area.
✔✔What is fecundity? - ✔✔Potential for reproduction.
✔✔What do density dependent factors involve? - ✔✔Living organisms.
✔✔What do density independent factors involve? - ✔✔Non-living abiotic factors.
✔✔What is putting out food plots? - ✔✔A way to manipulate habitats.
✔✔What defines vulnerable species? - ✔✔Numbers reduced by 30-50%.
✔✔What defines endangered species? - ✔✔Numbers reduced by 50-70%.
✔✔What defines critically endangered species? - ✔✔Numbers reduced by 80-90%.
