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“Nutrient fluxes now circulate as much through the anthroposphere as through natural cycles.”

“Strata fold into an anticlinal ridge directing run-off away from the summit.”

“A winter anticyclone brought frost and clear skies.”

“New Zealand occupies a roughly antipodal position relative to parts of Spain.”

“Every spring, the pond resonates with the chorus of hundreds of breeding anurans.”

“Because it does not need to lure animal pollinators, this forest shrub produces strictly apetalous blooms.”

“Earth reaches its aphelion during the first week of July.”

“Ladybugs were introduced into the garden to naturally control the destructive aphid population.”

“Creatures inhabiting the aphotic zone of the abyss rely entirely on chemosynthesis or falling marine snow for sustenance.”

“Heavy metals diffused freely through the root apoplasis before encountering the Casparian strip.”

“The scarlet and yellow rings of the coral snake serve as unmistakable aposematism to would-be predators.”

“The lichen's apothecium produces microscopic asci that release fungal spores into the air.”

“The crustacean uses its specialized front appendage to crush hard mollusk shells.”

“The desert lizard flattened its appressed scales to minimize air friction while scurrying across wind-blown dunes.”

“Subterranean termite workers are completely apterous throughout their working lives.”

“Inland aquaculture operations must manage nitrogen-rich effluent to avoid local eutrophication.”

“Untreated aquaculture-effluent induced coastal eutrophication.”

“Upregulation of aquaporin expression allowed root tissues to optimize water uptake under drought stress.”

“A dense shale aquiclude prevented agricultural chemicals from permeating the deeper drinking reservoir.”

“Overpumping depleted the regional aquifer.”

“The district relies on an aquifer-based thermal system to store surplus summer heat underground.”

“Succulent desert leaves possess specialized aquiferous layers that store moisture collected from rare rainstorms.”

“The clay aquitard retarded the vertical migration of contaminants toward the municipal well.”

“The arabinoxylan content in rye flour directly governs its water absorption during baking.”

“The country is running out of arable land due to industrial pollution.”

“Gibbons have developed specialized long limbs suited to their strictly arboreal lifestyle.”

“Archipelagic ecosystems feature high marine biodiversity due to shallow coral reefs.”

“Regional aridification forced pastoralist communities to abandon centuries-old grazing territories.”

“Extreme aridity limits agricultural output.”

“Frightened by the approaching predator, the armadillo rolled itself into a tight, armored ball.”

“Rainforest floor cover often consists of shade-tolerant aroids.”

“The crab is a marine arthropod protected by a rigid outer shell.”

“The remote atoll encloses a shallow turquoise lagoon teeming with marine life.”

“Night divers watched aurelia drift gracefully beneath the moonlit surface.”

“A geomagnetic storm unleashed brilliant auroral curtains southward.”

“A rigorous study of polar bear autecology highlights their vulnerability to sea-ice retreats.”

“The preserve protects the region's autochthonous traditions.”

“Phytoplankton serve as the primary autotrophs powering marine ecological food webs.”

“Greenhouse efficiency relies on optimizing the autotrophic output of young vegetable seedlings.”

“Warming soils accelerate autotrophic-respiration faster than photosynthetic uptake.”

“Sunlight prompts auxin redistribution toward the shaded side of the stem, driving the plant to bend toward light.”

“Conifer growth ceases entirely within the designated avalanche-track.”

“Strict environmental regulations limit the use of any toxic avicide around open grain fields.”

“The coastal wetlands shelter a remarkably rich avifauna during the autumn migratory transit.”

“The avocet delicately swept its bill through the shallow water for insects.”

“The auditor calculated the project's avoided emissions by comparing solar generation with the coal baseline.”

“Catastrophic flood surges triggered a river avulsion that redirected the main waterway across farmland.”

“Careful examination exposed tiny dormant flower buds nestling quietly within each leaf axil.”

“The biology class kept an axolotl in a terrarium to study regeneration.”

“The steep gravel slopes supported only skeletal, azonal soils vulnerable to downpours.”

“Rising marginal abatement-cost forced factories to modernize.”

“The lower, abaxial surface of the leaf turned pale blue.”

“The mountain ridge was blanketed by a dense abietine forest that endured harsh winters.”

“Research into abiogenesis examines how simple organic molecules assembled into self-replicating structures.”

“Deciduous trees abscise their foliage as winter approaches.”

“Cold autumn winds accelerate leaf abscission in deciduous trees.”

“Seabed mining risks disrupting fragile abyssopelagic habitats permanent structures.”

“The expedition documented several acanthaceous shrubs thriving along the arid limestone ridges.”

“The acanthocephalan completes its lifecycle by invading crustaceans before reaching its final fish host.”

“Stonecutters carved intricate acanthus leaves to soften the transitions across the Corinthian capital.”